43 changed files with 1420 additions and 2998 deletions
--- a/.cargo/config
+++ b/.cargo/config
@ -0,0 +1,2 @@
+[alias]
+run-wasm = "run --release --package run-wasm --"
--- a/.envrc
+++ b/.envrc
@ -0,0 +1 @@
+# use flake
--- a/.gitignore
+++ b/.gitignore
@ -1,2 +1,17 @@
 /target
 **/*.rs.bk
+.direnv
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
--- a/Cargo.lock
+++ b/Cargo.lock
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,19 +1,13 @@
 [package]
 name = "wedge"
 version = "0.1.0"
-authors = ["Michael Zhang <iptq@protonmail.com>"]
-edition = "2018"
+edition = "2021"

-[profile.release]
-opt-level = 'z'
-lto = true
-panic = 'abort'
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

 [dependencies]
-glium = "0.29.1"
-image = "0.23.14"
-json5 = "0.3.0"
-nalgebra = "0.26.2"
-nalgebra-glm = "0.12.0"
-serde = "1.0.125"
-serde_derive = "1.0.125"
+anyhow = "1.0.79"
+json5 = "0.4.1"
+macroquad = "0.4.4"
+serde = { version = "1.0.195", features = ["derive"] }
+serde_json = "1.0.111"
--- a/19
+++ b/19
@ -1,19 +0,0 @@
-Copyright (c) Michael Zhang
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
--- a/README.md
+++ b/README.md
@ -1,38 +0,0 @@
-wedge: a puzzle game
-====================
-
-![screenshot](screenshot.jpg?raw=true)
-
-Mechanics:
-
- **Objective:** Get the two players to reach the goals by navigating the level and pushing blocks around.
- Blocks with triangular sections will push other blocks in the other direction.
- Blocks of the same color will always move together.
-
-Controls: WASD for the left player and IJKL for the right player
-
-To-do list
----------
-
- [ ] Gameplay
-  - [x] Collision algorithm
-  - [x] Primitive animations
-  - [ ] Orientation indicator
-  - [ ] Unique textures
- [ ] Cosmetics
-  - [ ] A real menu interface
-  - [ ] In-game editor
-
-Credits
-------
-
-Original game made during MinneHack 2019: https://github.com/iptq/planar
-
- Yeshi Cai
- Mark Pekala
- Alex Shi
- Michael Zhang
-
-Rewrite: Michael Zhang
-
-License: MIT
--- a/default.nix
+++ b/default.nix
@ -0,0 +1,12 @@
+{ rustc, cargo, makeRustPlatform, cmake, pkg-config, fontconfig }:
+
+let rustPlatform = makeRustPlatform { inherit cargo rustc; };
+
+in rustPlatform.buildRustPackage {
+  name = "wedge";
+  src = ./.;
+  cargoLock.lockFile = ./Cargo.lock;
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ fontconfig ];
+}
--- a/flake.lock
+++ b/flake.lock
@ -0,0 +1,97 @@
+{
+  "nodes": {
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1706163833,
+        "narHash": "sha256-Vw+jTVtKceT+ScaIn7tHy8JjRZZpmg2fAdoInLAsW/M=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "043f63f55e9c9b808852ea82edee1f2a1af37e91",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1705309234,
+        "narHash": "sha256-uNRRNRKmJyCRC/8y1RqBkqWBLM034y4qN7EprSdmgyA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ef2e671c3b0c19053962c07dbda38332dcebf26",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1706006310,
+        "narHash": "sha256-nDPz0fj0IFcDhSTlXBU2aixcnGs2Jm4Zcuoj0QtmiXQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b43bb235efeab5324c5e486882ef46749188eee2",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "fenix": "fenix",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1706106882,
+        "narHash": "sha256-31DivWu0cC50gR2CgbGtLCf77nuiw4kdiI7B8ioqzLw=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "0d52934d19d7addcafcfda92a1d547b51556beec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
--- a/flake.nix
+++ b/flake.nix
@ -0,0 +1,64 @@
+{
+  inputs = {
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, fenix }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ fenix.overlays.default ];
+        };
+
+        rustc = pkgs.fenix.stable.rustc;
+        cargo = pkgs.fenix.stable.cargo;
+
+        neededLibs = with pkgs;
+          (with xorg; [ ])
+          ++ [ ];
+
+        flakePkgs = { wedge = pkgs.callPackage ./. { inherit rustc cargo; }; };
+      in
+      rec {
+        packages = flake-utils.lib.flattenTree flakePkgs;
+        defaultPackage = packages.wedge;
+
+        devShell = pkgs.mkShell {
+          inputsFrom = with packages; [ wedge ];
+
+          shellHook = ''
+            export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${
+              pkgs.lib.makeLibraryPath neededLibs
+            }"
+          '';
+
+          packages = (with pkgs; [
+            # cargo-watch
+            # cargo-deny
+            # cargo-edit
+            # sqlx-cli
+            # sqlite
+
+            (with pkgs.fenix;
+            combine [
+              rustc
+              cargo
+              #   targets.wasm32-unknown-unknown.latest.rust-std
+            ])
+          ]);
+
+          PKG_CONFIG_PATH = with pkgs;
+            lib.concatStringsSep ":" [
+              #   "${fontconfig.dev}/lib/pkgconfig"
+              #   "${xorg.libX11.dev}/lib/pkgconfig"
+              #   "${xorg.libXcursor.dev}/lib/pkgconfig"
+              #   "${xorg.libXi.dev}/lib/pkgconfig"
+              #   "${xorg.libXrandr.dev}/lib/pkgconfig"
+            ];
+        };
+      });
+}
--- a/fuzz/.gitignore
+++ b/fuzz/.gitignore
@ -1,4 +0,0 @@
-
-target
-corpus
-artifacts
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@ -1,26 +0,0 @@
-
-[package]
-name = "wedge-fuzz"
-version = "0.0.0"
-authors = ["Automatically generated"]
-publish = false
-edition = "2018"
-
-[package.metadata]
-cargo-fuzz = true
-
-[dependencies]
-libfuzzer-sys = "0.4"
-
-[dependencies.wedge]
-path = ".."
-
-# Prevent this from interfering with workspaces
-[workspace]
-members = ["."]
-
-[[bin]]
-name = "fuzz_target_1"
-path = "fuzz_targets/fuzz_target_1.rs"
-test = false
-doc = false
--- a/fuzz/fuzz_targets/fuzz_target_1.rs
+++ b/fuzz/fuzz_targets/fuzz_target_1.rs
@ -1,6 +0,0 @@
-#![no_main]
-use libfuzzer_sys::fuzz_target;
-
-fuzz_target!(|data: &[u8]| {
-    // fuzzed code goes here
-});
--- a/rustfmt.toml
+++ b/rustfmt.toml
@ -0,0 +1,4 @@
+max_width = 80
+tab_spaces = 2
+wrap_comments = true
+fn_single_line = true
--- a/screenshot.jpg
+++ b/screenshot.jpg
--- a/shaders/cell.frag
+++ b/shaders/cell.frag
@ -1,22 +0,0 @@
-#version 330
-
-in vec4 pos;
-out vec4 outcolor;
-
-uniform vec4 color;
-
-const float threshold = 0.05;
-
-const vec4 top = vec4(0.5, 0.5, 0.5, 1.0);
-const vec4 bot = vec4(0.4, 0.4, 0.4, 1.0);
-
-void main() {
-	outcolor = vec4(0.2 * (0.4 * (1 - pos.y) + 0.5 * (1 - pos.x)) + 0.2); 
-	outcolor.w = 1.0;
-	// if ((pos.x > -threshold && pos.x < threshold)
-	// 	|| (pos.y > -threshold && pos.y < threshold)
-	// 	|| (pos.x > 1.0-threshold && pos.x < 1.0+threshold)
-	// 	|| (pos.y > 1.0-threshold && pos.y < 1.0+threshold)) {
-	// 	outcolor = vec4(0.0, 0.0, 0.0, 1.0);
-	// }
-}
--- a/shaders/cell.vert
+++ b/shaders/cell.vert
@ -1,12 +0,0 @@
-#version 330
-
-in vec2 point;
-out vec4 pos;
-
-uniform mat4 target;
-uniform mat4 projection;
-
-void main() {
-    pos = vec4(point, 0.0, 1.0);
-    gl_Position = projection * target * pos;
-}
--- a/shaders/segment.frag
+++ b/shaders/segment.frag
@ -1,11 +0,0 @@
-#version 330
-
-in vec2 v_tex_coords;
-out vec4 outcolor;
-
-uniform sampler2D tex;
-uniform vec4 tint;
-
-void main() {
-    outcolor = tint * texture(tex, v_tex_coords);
-}
--- a/shaders/segment.vert
+++ b/shaders/segment.vert
@ -1,13 +0,0 @@
-#version 330
-
-in vec2 pos;
-in vec2 tex;
-out vec2 v_tex_coords;
-
-uniform mat4 target;
-uniform mat4 projection;
-
-void main() {
-    v_tex_coords = tex;
-    gl_Position = projection * target * vec4(pos, 0.0, 1.0);
-}
--- a/src/animations.rs
+++ b/src/animations.rs
@ -1,110 +1,116 @@
 use std::collections::{HashMap, HashSet};
 use std::time::Duration;

-use crate::enums::Board;
-use crate::level::{ChangeSet, Entity, FailSet};
+use crate::game_state::level::{ChangeSet, Entity, FailSet};
+use crate::game_state::Board;

 pub type MoveResult = Result<ChangeSet, FailSet>;
 pub type BlockOffsets = HashMap<Entity, (f32, f32)>;

 // TODO: don't yeet around a HashMap all the time
-pub type AnimationFn = Box<dyn Fn(MoveResult, BlockOffsets, f32) -> BlockOffsets>;
+pub type AnimationFn =
+  Box<dyn Fn(MoveResult, BlockOffsets, f32) -> BlockOffsets>;

 // in seconds
 const ANIMATION_DURATION: f32 = 1.0 / 6.0;

 #[derive(Default)]
 pub struct AnimationState {
-    pub is_animating: bool,
-    pub last_move_result: Option<MoveResult>,
-    pub progress: f32,
-    pub block_offsets: BlockOffsets,
-    pub immovable_blocks: HashSet<usize>,
-    progress_function: Option<AnimationFn>,
+  pub is_animating: bool,
+  pub last_move_result: Option<MoveResult>,
+  pub progress: f32,
+  pub block_offsets: BlockOffsets,
+  pub immovable_blocks: HashSet<usize>,
+  progress_function: Option<AnimationFn>,
 }

 impl AnimationState {
-    pub fn new() -> Self {
-        AnimationState {
-            is_animating: false,
-            last_move_result: None,
-            progress: 0.0,
-            block_offsets: BlockOffsets::new(),
-            immovable_blocks: HashSet::new(),
-            progress_function: None,
-        }
+  pub fn new() -> Self {
+    AnimationState {
+      is_animating: false,
+      last_move_result: None,
+      progress: 0.0,
+      block_offsets: BlockOffsets::new(),
+      immovable_blocks: HashSet::new(),
+      progress_function: None,
    }
+  }

-    pub fn begin_move_transition(&mut self, result: MoveResult) {
-        println!("result: {:?}", result);
-        self.last_move_result = Some(result);
-        self.is_animating = true;
-        self.progress = 0.0;
+  pub fn begin_move_transition(&mut self, result: MoveResult) {
+    println!("result: {:?}", result);
+    self.last_move_result = Some(result);
+    self.is_animating = true;
+    self.progress = 0.0;

-        let func = |last_move_result: MoveResult, mut offsets: BlockOffsets, progress: f32| {
-            use std::f32::consts::PI;
-            match last_move_result {
-                // transition
-                Ok(change_set) => {
-                    for (entity, direction) in change_set {
-                        // TODO: implement ease-out?
-                        let pair = direction.as_pair();
-                        // cap progress at 1.0, we don't want blocks going past where they're supposed to
-                        let progress = progress.min(1.0);
-                        let offset = (pair.0 as f32 * progress, pair.1 as f32 * progress);
-                        offsets.insert(entity, offset);
-                    }
-                }
-
-                // vibrate all blocking pieces
-                Err(fail_set) => {
-                    for index in fail_set {
-                        let delta = 0.05 * (4.0 * PI * progress).sin() / (progress + 0.5);
-                        offsets.insert(Entity::Block(index), (delta, delta));
-                    }
-                }
-            }
-            offsets
-        };
-        self.progress_function = Some(Box::new(func));
-    }
-
-    pub fn make_progress(&mut self, delta: Duration) {
-        let progress = self.progress + (delta.as_millis() as f32 / ANIMATION_DURATION) / 1000.0;
-
-        let block_offsets = if let Some(f) = &self.progress_function {
-            Some(f(
-                self.last_move_result.clone().unwrap(),
-                self.block_offsets.clone(),
-                progress,
-            ))
-        } else {
-            None
-        };
-
-        // this should always work
-        if let Some(block_offsets) = block_offsets {
-            self.block_offsets = block_offsets;
-            self.progress = progress;
+    let func = |last_move_result: MoveResult,
+                mut offsets: BlockOffsets,
+                progress: f32| {
+      use std::f32::consts::PI;
+      match last_move_result {
+        // transition
+        Ok(change_set) => {
+          for (entity, direction) in change_set {
+            // TODO: implement ease-out?
+            let pair = direction.as_pair();
+            // cap progress at 1.0, we don't want blocks going past where they're supposed to
+            let progress = progress.min(1.0);
+            let offset = (pair.0 as f32 * progress, pair.1 as f32 * progress);
+            offsets.insert(entity, offset);
+          }
        }

-        if self.progress > 1.0 {
-            self.is_animating = false;
-            self.block_offsets = BlockOffsets::new();
+        // vibrate all blocking pieces
+        Err(fail_set) => {
+          for index in fail_set {
+            let delta = 0.05 * (4.0 * PI * progress).sin() / (progress + 0.5);
+            offsets.insert(Entity::Block(index), (delta, delta));
+          }
        }
+      }
+      offsets
+    };
+    self.progress_function = Some(Box::new(func));
+  }
+
+  pub fn make_progress(&mut self, delta: Duration) {
+    let progress =
+      self.progress + (delta.as_millis() as f32 / ANIMATION_DURATION) / 1000.0;
+
+    let block_offsets = if let Some(f) = &self.progress_function {
+      Some(f(
+        self.last_move_result.clone().unwrap(),
+        self.block_offsets.clone(),
+        progress,
+      ))
+    } else {
+      None
+    };
+
+    // this should always work
+    if let Some(block_offsets) = block_offsets {
+      self.block_offsets = block_offsets;
+      self.progress = progress;
    }

-    pub fn get_block_offset(&self, index: usize) -> (f32, f32) {
-        self.block_offsets
-            .get(&Entity::Block(index))
-            .cloned()
-            .unwrap_or_else(|| (0.0, 0.0))
+    if self.progress > 1.0 {
+      self.is_animating = false;
+      self.block_offsets = BlockOffsets::new();
    }
+  }

-    pub fn get_player_offset(&self, board: Board) -> (f32, f32) {
-        self.block_offsets
-            .get(&Entity::Player(board))
-            .cloned()
-            .unwrap_or_else(|| (0.0, 0.0))
-    }
+  pub fn get_block_offset(&self, index: usize) -> (f32, f32) {
+    self
+      .block_offsets
+      .get(&Entity::Block(index))
+      .cloned()
+      .unwrap_or_else(|| (0.0, 0.0))
+  }
+
+  pub fn get_player_offset(&self, board: Board) -> (f32, f32) {
+    self
+      .block_offsets
+      .get(&Entity::Player(board))
+      .cloned()
+      .unwrap_or_else(|| (0.0, 0.0))
+  }
 }
--- a/src/color.rs
+++ b/src/color.rs
@ -1,14 +0,0 @@
-#[derive(Copy, Clone, Debug)]
-pub struct Color(pub f32, pub f32, pub f32, pub f32);
-
-impl Color {
-    pub fn from_rgb_u32(r: u32, g: u32, b: u32) -> Self {
-        Color(r as f32 / 256.0, g as f32 / 256.0, b as f32 / 256.0, 1.0)
-    }
-}
-
-impl From<(u32, u32, u32)> for Color {
-    fn from(tuple: (u32, u32, u32)) -> Self {
-        Color::from_rgb_u32(tuple.0, tuple.1, tuple.2)
-    }
-}
--- a/src/data.rs
+++ b/src/data.rs
@ -1,23 +0,0 @@
-#[derive(Debug, Deserialize)]
-pub struct PlayerData {
-    pub position: (i32, i32),
-    pub color: (u32, u32, u32),
-}
-
-#[derive(Debug, Deserialize)]
-pub struct BlockData {
-    pub movable: bool,
-    pub orientation: u32,
-    pub color: (u32, u32, u32),
-    pub segments: Vec<[i32; 4]>,
-}
-
-#[derive(Debug, Deserialize)]
-pub struct LevelData {
-    pub dimensions: [u32; 2],
-    pub player1: PlayerData,
-    pub player2: PlayerData,
-    pub goal1: (i32, i32),
-    pub goal2: (i32, i32),
-    pub blocks: Vec<BlockData>,
-}
--- a/src/draw.rs
+++ b/src/draw.rs
@ -0,0 +1 @@
+pub fn draw() {}
--- a/src/enums.rs
+++ b/src/enums.rs
@ -1,109 +0,0 @@
-use std::ops::Add;
-
-#[derive(Debug, Eq, PartialEq, Hash, PartialOrd, Copy, Clone)]
-pub enum Board {
-    Left = 0,
-    Right = 1,
-}
-
-impl From<i32> for Board {
-    fn from(n: i32) -> Self {
-        match n {
-            0 => Board::Left,
-            1 => Board::Right,
-            _ => panic!("expecting 0 or 1, got {}", n),
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug)]
-pub enum Orientation {
-    None = 0,
-    Horizontal = 1,
-    Vertical = 2,
-    Both = 3,
-}
-
-impl From<u32> for Orientation {
-    fn from(n: u32) -> Self {
-        match n {
-            0 => Orientation::Both,
-            1 => Orientation::Horizontal,
-            2 => Orientation::Vertical,
-            _ => panic!("expecting 0..2, got {}", n),
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
-pub enum PushDir {
-    Up,
-    Down,
-    Left,
-    Right,
-}
-
-impl PushDir {
-    pub fn as_pair(self) -> (i32, i32) {
-        match self {
-            PushDir::Up => (0, -1),
-            PushDir::Down => (0, 1),
-            PushDir::Left => (-1, 0),
-            PushDir::Right => (1, 0),
-        }
-    }
-}
-
-impl Add<PushDir> for (i32, i32, Board) {
-    type Output = (i32, i32, Board);
-
-    fn add(self, rhs: PushDir) -> Self::Output {
-        let offset = rhs.as_pair();
-        (self.0 + offset.0, self.1 + offset.1, self.2)
-    }
-}
-
-//  /\
-// /21\
-// \34/
-//  \/
-#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
-pub enum Shape {
-    Full = 0,
-    TopRight = 1,
-    TopLeft = 2,
-    BottomLeft = 3,
-    BottomRight = 4,
-}
-
-impl From<i32> for Shape {
-    fn from(n: i32) -> Self {
-        match n {
-            0 => Shape::Full,
-            1 => Shape::TopRight,
-            2 => Shape::TopLeft,
-            3 => Shape::BottomLeft,
-            4 => Shape::BottomRight,
-            _ => panic!("expecting 0..4, got {}", n),
-        }
-    }
-}
-
-impl Shape {
-    pub fn get_opposite(self) -> Option<Shape> {
-        use Shape::*;
-        match self {
-            TopRight => Some(BottomLeft),
-            BottomLeft => Some(TopRight),
-            TopLeft => Some(BottomRight),
-            BottomRight => Some(TopLeft),
-            Full => None,
-        }
-    }
-
-    pub fn is_opposite(self, other: Shape) -> bool {
-        self.get_opposite()
-            .map(|shape| shape == other)
-            .unwrap_or_else(|| false)
-    }
-}
--- a/src/game.rs
+++ b/src/game.rs
@ -1,82 +0,0 @@
-use std::time::Duration;
-
-use glium::glutin::event::{ElementState, Event, WindowEvent};
-use glium::{Display, Frame};
-
-use crate::keymap::Keymap;
-use crate::renderer::Renderer;
-use crate::resources::Resources;
-use crate::screens::{MenuScreen, ScreenStack};
-
-const SEGMENT_VERT: &str = include_str!("../shaders/segment.vert");
-const SEGMENT_FRAG: &str = include_str!("../shaders/segment.frag");
-const CELL_VERT: &str = include_str!("../shaders/cell.vert");
-const CELL_FRAG: &str = include_str!("../shaders/cell.frag");
-
-const SEGMENT_IMAGE: &[u8] = include_bytes!("../textures/segment.png");
-
-pub struct Game<'a> {
-    pub resources: Resources,
-    pub display: &'a Display,
-    keymap: Keymap,
-    screen_stack: ScreenStack,
-}
-
-impl<'a> Game<'a> {
-    pub fn new(display: &'a Display) -> Game {
-        let mut resources = Resources::default();
-        resources
-            .load_image_from_memory(display, "segment", &SEGMENT_IMAGE, false)
-            .unwrap();
-        resources
-            .load_shader(display, "segment", &SEGMENT_VERT, &SEGMENT_FRAG)
-            .unwrap();
-        resources
-            .load_shader(display, "cell", &CELL_VERT, &CELL_FRAG)
-            .unwrap();
-
-        // bruh
-        let screen_stack = ScreenStack::with(MenuScreen::new());
-
-        Game {
-            resources,
-            display,
-            keymap: Keymap::new(),
-            screen_stack,
-        }
-    }
-
-    pub fn target(&self) -> Frame {
-        self.display.draw()
-    }
-
-    pub fn handle_event(&mut self, event: Event<()>) {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::Resized(size) => self.resources.window_dimensions = size.into(),
-                WindowEvent::KeyboardInput { input, .. } => {
-                    if let Some(code) = &input.virtual_keycode {
-                        if let ElementState::Pressed = &input.state {
-                            self.keymap.pressed(*code);
-                        } else {
-                            self.keymap.release(*code);
-                        }
-                    }
-                }
-                _ => (),
-            }
-        }
-    }
-
-    pub fn create_renderer<'b>(&self, target: &'b mut Frame) -> Renderer<'b, '_> {
-        Renderer::new(self, target)
-    }
-
-    pub fn update(&mut self, delta: Duration) {
-        self.screen_stack.update(delta, &self.keymap);
-    }
-
-    pub fn render(&self, renderer: &mut Renderer) {
-        self.screen_stack.render(renderer);
-    }
-}
--- a/src/game_state/block.rs
+++ b/src/game_state/block.rs
@ -0,0 +1,35 @@
+use super::{BlockData, Color, Orientation, SegmentState};
+
+#[derive(Clone, Debug)]
+pub struct BlockState {
+  pub index: usize,
+  pub movable: bool,
+  pub color: Color,
+  pub orientation: Orientation,
+  pub segments: Vec<SegmentState>,
+}
+
+impl BlockState {
+  pub fn from_data(index: usize, data: &BlockData) -> Self {
+    let movable = data.movable;
+    let segments = data
+      .segments
+      .iter()
+      .map(|segment| SegmentState {
+        position: (segment[0], segment[1]),
+        shape: segment[2].into(),
+        board: segment[3].into(),
+      })
+      .collect();
+    let orientation = data.orientation.into();
+    let color = Color(data.color.0, data.color.1, data.color.2);
+
+    BlockState {
+      index,
+      movable,
+      color,
+      segments,
+      orientation,
+    }
+  }
+}
--- a/src/game_state/level.rs
+++ b/src/game_state/level.rs
@ -0,0 +1,48 @@
+use std::collections::{HashMap, HashSet};
+
+use super::{Board, LevelState, PushDir, Shape};
+
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum Entity {
+  Block(usize),
+  Player(Board),
+}
+
+pub type ChangeSet = HashMap<Entity, PushDir>;
+
+pub type FailSet = HashSet<usize>;
+
+impl LevelState {
+  pub fn apply_change_set(&mut self, change_set: ChangeSet) {
+    for (entity, direction) in change_set {
+      let direction = direction.as_pair();
+      match entity {
+        Entity::Player(board) => {
+          let player = match board {
+            Board::Left => &mut self.player1_position,
+            Board::Right => &mut self.player2_position,
+          };
+          player.0 += direction.0;
+          player.1 += direction.1;
+        }
+        Entity::Block(index) => {
+          let block = self.blocks.get_mut(index).expect("big failure");
+          for segment in &mut block.segments {
+            segment.position.0 += direction.0;
+            segment.position.1 += direction.1;
+          }
+        }
+      }
+    }
+  }
+
+  pub fn try_move(
+    &mut self,
+    board: Board,
+    direction: PushDir,
+  ) -> Result<ChangeSet, FailSet> {
+    let mut change_set = ChangeSet::default();
+    change_set.insert(Entity::Player(board), direction);
+    self.player_can_move(board, direction, change_set)
+  }
+}
--- a/src/game_state/mod.rs
+++ b/src/game_state/mod.rs
@ -0,0 +1,197 @@
+pub mod block;
+pub mod level;
+pub mod move_rules;
+pub mod render;
+
+use std::ops::Add;
+
+use anyhow::Result;
+use macroquad::color::Color as MQColor;
+
+use self::block::BlockState;
+
+#[derive(Debug)]
+pub struct LevelState {
+  pub data: LevelData,
+  pub blocks: Vec<BlockState>,
+  pub player1_position: (i32, i32),
+  pub player2_position: (i32, i32),
+}
+
+#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
+pub struct SegmentState {
+  position: (i32, i32),
+  shape: Shape,
+  board: Board,
+}
+
+impl LevelState {
+  pub fn new(data: LevelData) -> Self {
+    let blocks = data
+      .blocks
+      .iter()
+      .enumerate()
+      .map(|(i, block)| BlockState::from_data(i, block))
+      .collect();
+
+    LevelState {
+      blocks,
+      player1_position: data.player1.position,
+      player2_position: data.player2.position,
+      data,
+    }
+  }
+
+  pub fn check_win_condition(&self) -> bool {
+    self.player1_position == self.data.goal1
+      && self.player2_position == self.data.goal2
+  }
+}
+
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+pub struct Color(u8, u8, u8);
+
+impl Into<MQColor> for Color {
+  fn into(self) -> MQColor {
+    MQColor::from_rgba(self.0, self.1, self.2, 255)
+  }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PlayerData {
+  pub position: (i32, i32),
+  pub color: Color,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlockData {
+  pub movable: bool,
+  pub orientation: u32,
+  pub color: Color,
+  pub segments: Vec<[i32; 4]>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct LevelData {
+  pub dimensions: [u32; 2],
+  pub player1: PlayerData,
+  pub player2: PlayerData,
+  pub goal1: (i32, i32),
+  pub goal2: (i32, i32),
+  pub blocks: Vec<BlockData>,
+}
+
+impl LevelData {
+  pub fn load_from_string(string: &str) -> Result<Self> {
+    json5::from_str(string).map_err(|err| err.into())
+  }
+}
+
+#[derive(Debug, Eq, PartialEq, Hash, PartialOrd, Copy, Clone)]
+pub enum Board {
+  Left = 0,
+  Right = 1,
+}
+
+impl From<i32> for Board {
+  fn from(n: i32) -> Self {
+    match n {
+      0 => Board::Left,
+      1 => Board::Right,
+      _ => panic!("expecting 0 or 1, got {}", n),
+    }
+  }
+}
+
+#[derive(Copy, Clone, Debug)]
+pub enum Orientation {
+  None = 0,
+  Horizontal = 1,
+  Vertical = 2,
+  Both = 3,
+}
+
+impl From<u32> for Orientation {
+  fn from(n: u32) -> Self {
+    match n {
+      0 => Orientation::Both,
+      1 => Orientation::Horizontal,
+      2 => Orientation::Vertical,
+      _ => panic!("expecting 0..2, got {}", n),
+    }
+  }
+}
+
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum PushDir {
+  Up,
+  Down,
+  Left,
+  Right,
+}
+
+impl PushDir {
+  pub fn as_pair(self) -> (i32, i32) {
+    match self {
+      PushDir::Up => (0, -1),
+      PushDir::Down => (0, 1),
+      PushDir::Left => (-1, 0),
+      PushDir::Right => (1, 0),
+    }
+  }
+}
+
+impl Add<PushDir> for (i32, i32, Board) {
+  type Output = (i32, i32, Board);
+
+  fn add(self, rhs: PushDir) -> Self::Output {
+    let offset = rhs.as_pair();
+    (self.0 + offset.0, self.1 + offset.1, self.2)
+  }
+}
+
+//  /\
+// /21\
+// \34/
+//  \/
+#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
+pub enum Shape {
+  Full = 0,
+  TopRight = 1,
+  TopLeft = 2,
+  BottomLeft = 3,
+  BottomRight = 4,
+}
+
+impl From<i32> for Shape {
+  fn from(n: i32) -> Self {
+    match n {
+      0 => Shape::Full,
+      1 => Shape::TopRight,
+      2 => Shape::TopLeft,
+      3 => Shape::BottomLeft,
+      4 => Shape::BottomRight,
+      _ => panic!("expecting 0..4, got {}", n),
+    }
+  }
+}
+
+impl Shape {
+  pub fn get_opposite(self) -> Option<Shape> {
+    use Shape::*;
+    match self {
+      TopRight => Some(BottomLeft),
+      BottomLeft => Some(TopRight),
+      TopLeft => Some(BottomRight),
+      BottomRight => Some(TopLeft),
+      Full => None,
+    }
+  }
+
+  pub fn is_opposite(self, other: Shape) -> bool {
+    self
+      .get_opposite()
+      .map(|shape| shape == other)
+      .unwrap_or_else(|| false)
+  }
+}
--- a/src/game_state/move_rules.rs
+++ b/src/game_state/move_rules.rs
@ -0,0 +1,245 @@
+use std::collections::HashSet;
+
+use crate::game_state::{level::Entity, Board, Orientation, PushDir, Shape};
+
+use super::{
+  level::{ChangeSet, FailSet},
+  LevelState, SegmentState,
+};
+
+impl LevelState {
+  pub fn player_can_move(
+    &self,
+    board: Board,
+    direction: PushDir,
+    change_set: ChangeSet,
+  ) -> Result<ChangeSet, FailSet> {
+    let player_position = match board {
+      Board::Left => &self.player1_position,
+      Board::Right => &self.player2_position,
+    };
+    let player_segment = SegmentState {
+      position: *player_position,
+      shape: Shape::Full,
+      board,
+    };
+    self.segment_can_move(None, player_segment, direction, change_set)
+  }
+
+  fn block_can_move(
+    &self,
+    index: usize,
+    direction: PushDir,
+    mut change_set: ChangeSet,
+  ) -> Result<ChangeSet, FailSet> {
+    println!("block_can_move({:?}, {:?})", index, direction);
+    let block = match self.blocks.get(index) {
+      Some(block) => block,
+      None => return Err(HashSet::new()),
+    };
+
+    // is the block even movable?
+    if !block.movable {
+      return Err(set!(index));
+    }
+
+    // does the direction match the orientation?
+    match (block.orientation, direction) {
+      (Orientation::Horizontal, PushDir::Left)
+      | (Orientation::Horizontal, PushDir::Right)
+      | (Orientation::Vertical, PushDir::Up)
+      | (Orientation::Vertical, PushDir::Down)
+      | (Orientation::Both, _) => (),
+      _ => return Err(set!(index)),
+    }
+
+    // TODO: change this to use &mut instead of returning a new one each time
+    change_set.insert(Entity::Block(index), direction);
+    for segment in block.segments.iter() {
+      match self.segment_can_move(
+        Some(index),
+        segment.clone(),
+        direction,
+        change_set.clone(),
+      ) {
+        Ok(new_change_set) => change_set = new_change_set,
+        Err(fail_set) => return Err(fail_set),
+      }
+    }
+
+    Ok(change_set)
+  }
+
+  fn segment_can_move(
+    &self,
+    block_index: Option<usize>,
+    segment: SegmentState,
+    direction: PushDir,
+    change_set: ChangeSet,
+  ) -> Result<ChangeSet, FailSet> {
+    println!(
+      "segment_can_move({:?}, {:?}, {:?})",
+      block_index, segment, direction
+    );
+    let segment_loc = (segment.position.0, segment.position.1, segment.board);
+    let target = segment_loc + direction;
+    println!(" - target: {:?}", target);
+
+    // is the target actually in the map?
+    if target.0 < 0
+      || target.0 >= self.data.dimensions[0] as i32
+      || target.1 < 0
+      || target.1 >= self.data.dimensions[1] as i32
+    {
+      return Err(entity_fail!(block_index));
+    }
+
+    // retrieve other blocks that might be occupying this current space and the target space
+    let mut current_occupant = None;
+    let mut target_occupant = None;
+    for (i, block) in self.blocks.iter().enumerate() {
+      // skip other segments of the same block
+      if let Some(n) = block_index {
+        if n == i {
+          continue;
+        }
+      }
+
+      // offset from the change set
+      let offset = match change_set.get(&Entity::Block(i)) {
+        Some(direction) => direction.as_pair(),
+        None => (0, 0),
+      };
+
+      for segment in block.segments.iter() {
+        // don't get segments on different boards
+        if segment.board != segment_loc.2 {
+          continue;
+        }
+
+        let mut segment_pos = segment.position;
+
+        if segment_pos == (segment_loc.0, segment_loc.1) {
+          current_occupant = Some((i, segment.shape, block.orientation));
+        }
+
+        segment_pos.0 += offset.0;
+        segment_pos.1 += offset.1;
+
+        if segment_pos == (target.0, target.1) {
+          target_occupant =
+            Some((Entity::Block(i), segment.shape, block.orientation));
+        }
+      }
+    }
+    // check if the target occupant is actually a player
+    if let None = target_occupant {
+      if segment.board == Board::Left
+        && self.player1_position == (target.0, target.1)
+      {
+        target_occupant =
+          Some((Entity::Player(Board::Left), Shape::Full, Orientation::None));
+      } else if segment.board == Board::Right
+        && self.player2_position == (target.0, target.1)
+      {
+        target_occupant =
+          Some((Entity::Player(Board::Right), Shape::Full, Orientation::None));
+      }
+    }
+
+    println!(
+      " - occupants: current={:?} | target={:?}",
+      current_occupant, target_occupant
+    );
+
+    // handle special pushes
+    if let Some((other_block, other_shape, other_orientation)) =
+      current_occupant
+    {
+      // are both shapes triangles?
+      let both_triangles = match (segment.shape, other_shape) {
+        (Shape::Full, Shape::Full) => false,
+        (Shape::Full, _) => unreachable!("invalid to have triangle + full"),
+        (_, Shape::Full) => unreachable!("invalid to have triangle + full"),
+        _ => true,
+      };
+
+      if both_triangles {
+        // what directions could we be pushing the other block into?
+        let possible_directions = match segment.shape {
+          Shape::TopRight => [PushDir::Up, PushDir::Right],
+          Shape::TopLeft => [PushDir::Left, PushDir::Up],
+          Shape::BottomLeft => [PushDir::Down, PushDir::Left],
+          Shape::BottomRight => [PushDir::Right, PushDir::Down],
+          Shape::Full => unreachable!("already eliminated this possibility"),
+        };
+        println!(" - possible directions: {:?}", possible_directions);
+
+        // does the direction we're pushing appear in this list?
+        if possible_directions.contains(&direction) {
+          // the other shape goes in the other direction
+          let other_direction = match other_orientation {
+            Orientation::None => {
+              unreachable!("already eliminated this possibility")
+            }
+            Orientation::Vertical => [PushDir::Up, PushDir::Down],
+            Orientation::Horizontal => [PushDir::Left, PushDir::Right],
+            Orientation::Both => unimplemented!(),
+          };
+
+          let possible_directions =
+            possible_directions.iter().collect::<HashSet<_>>();
+          let other_direction = other_direction.iter().collect();
+          let mut intersected_direction =
+            possible_directions.intersection(&other_direction);
+          let new_direction = **intersected_direction.next().unwrap();
+
+          // let other_direction = {
+          //     let mut set = possible_directions.iter().collect::<HashSet<_>>();
+          //     set.remove(&direction);
+          //     *set.into_iter().next().unwrap()
+          // };
+
+          let mut result =
+            self.block_can_move(other_block, new_direction, change_set);
+          if let Ok(ref mut change_set) = result {
+            change_set.insert(Entity::Block(other_block), new_direction);
+          }
+
+          return result;
+        }
+      }
+    }
+
+    // handle normal pushes
+    if let Some((entity, shape, _orientation)) = target_occupant {
+      match entity {
+        Entity::Player(_) => {
+          // TODO: assert that the board is the same
+          Err(fail_set!(change_set))
+        }
+        Entity::Block(index) => {
+          if
+          // if it's part of the same block it's ok to push
+          block_index.is_some() && block_index.unwrap() == index ||
+                    // if the shapes are opposite, we can actually both fit into the same spot
+                    segment.shape.is_opposite(shape)
+          {
+            Ok(change_set)
+          }
+          // if the block is already in the change set, it can't move
+          else if change_set.contains_key(&Entity::Block(index)) {
+            Err(fail_set!(change_set))
+          }
+          // if the next block can move then so can this one
+          else {
+            self.block_can_move(index, direction, change_set)
+          }
+        }
+      }
+    } else {
+      // coast is clear, push away!
+      Ok(change_set)
+    }
+  }
+}
--- a/src/game_state/render.rs
+++ b/src/game_state/render.rs
@ -0,0 +1,183 @@
+use macroquad::color::Color as MQColor;
+use macroquad::math::{vec2, Vec2};
+use macroquad::{
+  shapes::draw_rectangle,
+  window::{screen_height, screen_width},
+};
+
+use crate::animations::AnimationState;
+
+use super::{Board, Color, LevelState, Orientation, Shape};
+
+impl LevelState {
+  pub fn render(&self, animations: &AnimationState) {
+    let width = screen_width();
+    let height = screen_height();
+
+    // board positioning calculations
+    let playfield_ratio = (2 * self.data.dimensions[0] + 6) as f32
+      / (self.data.dimensions[1] + 4) as f32;
+    let screen_ratio = width / height;
+
+    let cols = self.data.dimensions[0] as i32;
+    let rows = self.data.dimensions[1] as i32;
+
+    let (scale, xoff, yoff) = if playfield_ratio > screen_ratio {
+      let scale = width as f32 / (2 * cols + 6) as f32;
+      let yoff = height as f32 / 2.0 - (rows + 4) as f32 * scale / 2.0;
+      (scale, 0.0, yoff)
+    } else {
+      let scale = height as f32 / (rows + 4) as f32;
+      let xoff = width as f32 / 2.0 - (2 * cols + 6) as f32 * scale / 2.0;
+      (scale, xoff, 0.0)
+    };
+
+    let left_offset = vec2(xoff, yoff);
+
+    self.render_boards(scale, left_offset, animations);
+  }
+
+  fn render_boards(
+    &self,
+    scale: f32,
+    offset: Vec2,
+    animations: &AnimationState,
+  ) {
+    let left_off = (offset.0 + 2 * scale, offset.1 + 2 * scale);
+    let right_off = (
+      offset.0 + (4 + self.data.dimensions[0] as i32) * scale,
+      offset.1 + 2 * scale,
+    );
+
+    // render the grid
+    // TODO: do this in one single pass instead of once for each cell
+    for x in 0..self.data.dimensions[0] as i32 {
+      for y in 0..self.data.dimensions[1] as i32 {
+        self
+          .render_cell((left_off.0 + x * scale, left_off.1 + y * scale), scale);
+        self.render_cell(
+          (right_off.0 + x * scale, right_off.1 + y * scale),
+          scale,
+        );
+      }
+    }
+
+    // render blocks
+    for (i, block) in self.blocks.iter().enumerate() {
+      for segment in block.segments.iter() {
+        let offset = match &segment.board {
+          Board::Left => left_off,
+          Board::Right => right_off,
+        };
+        let mut location = (
+          offset.0 + segment.position.0 * scale,
+          offset.1 + segment.position.1 * scale,
+        );
+        let animation_offset = animations.get_block_offset(i);
+        location.0 += (animation_offset.0 * scale as f32) as i32;
+        location.1 += (animation_offset.1 * scale as f32) as i32;
+        self.render_segment(
+          location,
+          scale,
+          block.color,
+          block.orientation,
+          segment.shape,
+        );
+      }
+    }
+
+    // render goals
+    self.render_goal(self.data.goal1, scale, left_off);
+    self.render_goal(self.data.goal2, scale, right_off);
+
+    // render player
+    self.render_player(
+      Board::Left,
+      self.player1_position,
+      self.data.player1.color,
+      scale,
+      animations,
+      left_off,
+    );
+
+    self.render_player(
+      Board::Right,
+      self.player2_position,
+      self.data.player1.color,
+      scale,
+      animations,
+      right_off,
+    );
+  }
+
+  fn render_player(
+    &self,
+    board: Board,
+    player_position: (i32, i32),
+    player_color: Color,
+    scale: i32,
+    animations: &AnimationState,
+    offset: (i32, i32),
+  ) {
+    let mut location = (
+      offset.0 + player_position.0 * scale + 4,
+      offset.1 + player_position.1 * scale + 4,
+    );
+    let animation_offset = animations.get_player_offset(board);
+    location.0 += (animation_offset.0 * scale as f32) as i32;
+    location.1 += (animation_offset.1 * scale as f32) as i32;
+
+    self.render_segment(
+      location,
+      scale - 8,
+      player_color,
+      Orientation::Both,
+      Shape::Full,
+    );
+  }
+
+  fn render_goal(&self, location: (i32, i32), scale: f32, offset: (i32, i32)) {
+    let position = (
+      offset.0 + location.0 * scale + 4,
+      offset.1 + location.1 * scale + 4,
+    );
+    self.render_segment(
+      position,
+      scale - 8,
+      Color(102, 204, 102),
+      Orientation::Both,
+      Shape::Full,
+    );
+  }
+
+  fn render_cell(&self, location: (i32, i32), scale: f32) {
+    let new_x = location.0 * scale;
+    let new_y = location.1 * scale;
+
+    let color = MQColor::from_rgba(153, 153, 153, 255);
+
+    draw_rectangle(
+      new_x as f32,
+      new_y as f32,
+      scale as f32,
+      scale as f32,
+      color.into(),
+    )
+  }
+
+  fn render_segment(
+    &self,
+    location: (i32, i32),
+    scale: i32,
+    color: Color,
+    orientation: Orientation,
+    shape: Shape,
+  ) {
+    // draw_circle(
+    //   location.0 as f32,
+    //   location.1 as f32,
+    //   scale as f32 * 0.8,
+    //   color.into(),
+    // );
+  }
+}
--- a/src/keymap.rs
+++ b/src/keymap.rs
@ -1,27 +0,0 @@
-use std::collections::HashMap;
-
-use glium::glutin::event::VirtualKeyCode;
-
-pub struct Keymap(HashMap<VirtualKeyCode, bool>);
-
-impl Keymap {
-    pub fn new() -> Self {
-        Keymap(HashMap::new())
-    }
-
-    pub fn pressed(&mut self, code: VirtualKeyCode) {
-        self.0.insert(code, true);
-    }
-
-    pub fn release(&mut self, code: VirtualKeyCode) {
-        self.0.insert(code, false);
-    }
-
-    pub fn is_pressed(&self, code: VirtualKeyCode) -> bool {
-        if let Some(true) = self.0.get(&code) {
-            true
-        } else {
-            false
-        }
-    }
-}
--- a/src/level/block.rs
+++ b/src/level/block.rs
@ -1,60 +0,0 @@
-use crate::color::Color;
-use crate::data::BlockData;
-use crate::enums::Orientation;
-use crate::level::Segment;
-
-pub trait Blockish {
-    fn get_color(&self) -> Color;
-    fn get_orientation(&self) -> Orientation;
-
-    // TODO: don't alloc/clone here?
-    fn get_segments(&self) -> Vec<Segment>;
-}
-
-#[derive(Clone)]
-pub struct Block {
-    index: usize,
-    pub movable: bool,
-    color: Color,
-    pub orientation: Orientation,
-    pub segments: Vec<Segment>,
-}
-
-impl Block {
-    pub fn from_data(index: usize, data: &BlockData) -> Self {
-        let movable = data.movable;
-        let segments = data
-            .segments
-            .iter()
-            .map(|segment| Segment {
-                position: (segment[0], segment[1]),
-                shape: segment[2].into(),
-                board: segment[3].into(),
-            })
-            .collect();
-        let orientation = data.orientation.into();
-        let color = Color::from_rgb_u32(data.color.0, data.color.1, data.color.2);
-
-        Block {
-            index,
-            movable,
-            color,
-            segments,
-            orientation,
-        }
-    }
-}
-
-impl Blockish for Block {
-    fn get_color(&self) -> Color {
-        self.color
-    }
-
-    fn get_orientation(&self) -> Orientation {
-        self.orientation
-    }
-
-    fn get_segments(&self) -> Vec<Segment> {
-        self.segments.clone()
-    }
-}
--- a/src/level/macros.rs
+++ b/src/level/macros.rs
@ -1,30 +0,0 @@
-macro_rules! set {
-	($($item:expr)*) => {
-		{
-			let mut set = std::collections::HashSet::new();
-			$(set.insert($item);)*
-			set
-		}
-	}
-}
-
-macro_rules! fail_set {
-    ($change_set:expr) => {
-        $change_set
-            .iter()
-            .filter_map(|(entity, _)| match entity {
-                Entity::Block(index) => Some(*index),
-                Entity::Player(_) => None,
-            })
-            .collect()
-    };
-}
-
-macro_rules! entity_fail {
-    ($item:expr) => {
-        match $item {
-            Some(index) => set!(index),
-            None => std::collections::HashSet::new(),
-        }
-    };
-}
--- a/src/level/mod.rs
+++ b/src/level/mod.rs
@ -1,465 +0,0 @@
-#[macro_use]
-mod macros;
-
-mod block;
-mod player;
-
-use std::collections::{HashMap, HashSet, VecDeque};
-
-use crate::animations::AnimationState;
-use crate::color::Color;
-use crate::data::LevelData;
-use crate::enums::{Board, Orientation, PushDir, Shape};
-use crate::renderer::Renderer;
-
-use self::block::{Block, Blockish};
-use self::player::Player;
-
-pub struct Level {
-    dimensions: (u32, u32),
-    move_stack: VecDeque<()>,
-    blocks: Vec<Block>,
-    player1: Player,
-    player2: Player,
-    goal1: (i32, i32),
-    goal2: (i32, i32),
-}
-
-#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
-pub struct Segment {
-    position: (i32, i32),
-    shape: Shape,
-    board: Board,
-}
-
-#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
-pub enum Entity {
-    Block(usize),
-    Player(Board),
-}
-
-pub type ChangeSet = HashMap<Entity, PushDir>;
-
-pub type FailSet = HashSet<usize>;
-
-impl Level {
-    pub fn from_json(data: impl AsRef<str>) -> Level {
-        let data: LevelData = json5::from_str(data.as_ref()).unwrap();
-        println!("level data: {:?}", data);
-
-        let blocks = data
-            .blocks
-            .iter()
-            .enumerate()
-            .map(|(i, block)| Block::from_data(i, block))
-            .collect();
-
-        let player1 = Player {
-            position: data.player1.position,
-            color: data.player1.color.into(),
-        };
-        let player2 = Player {
-            position: data.player2.position,
-            color: data.player2.color.into(),
-        };
-
-        Level {
-            dimensions: (data.dimensions[0], data.dimensions[1]),
-            move_stack: VecDeque::new(),
-            blocks,
-            player1,
-            player2,
-            goal1: data.goal1,
-            goal2: data.goal2,
-        }
-    }
-
-    // check if we won
-    pub fn check_win_condition(&self) -> bool {
-        self.player1.position == self.goal1 && self.player2.position == self.goal2
-    }
-
-    pub fn apply_change_set(&mut self, change_set: ChangeSet) {
-        for (entity, direction) in change_set {
-            let direction = direction.as_pair();
-            match entity {
-                Entity::Player(board) => {
-                    let player = match board {
-                        Board::Left => &mut self.player1,
-                        Board::Right => &mut self.player2,
-                    };
-                    player.position.0 += direction.0;
-                    player.position.1 += direction.1;
-                }
-                Entity::Block(index) => {
-                    let block = self.blocks.get_mut(index).expect("big failure");
-                    for segment in &mut block.segments {
-                        segment.position.0 += direction.0;
-                        segment.position.1 += direction.1;
-                    }
-                }
-            }
-        }
-    }
-
-    pub fn try_move(&mut self, board: Board, direction: PushDir) -> Result<ChangeSet, FailSet> {
-        let mut change_set = ChangeSet::default();
-        change_set.insert(Entity::Player(board), direction);
-        self.player_can_move(board, direction, change_set)
-    }
-
-    fn player_can_move(
-        &self,
-        board: Board,
-        direction: PushDir,
-        change_set: ChangeSet,
-    ) -> Result<ChangeSet, FailSet> {
-        let player = match board {
-            Board::Left => &self.player1,
-            Board::Right => &self.player2,
-        };
-        let player_segment = Segment {
-            position: player.position,
-            shape: Shape::Full,
-            board,
-        };
-        self.segment_can_move(None, player_segment, direction, change_set)
-    }
-
-    fn block_can_move(
-        &self,
-        index: usize,
-        direction: PushDir,
-        mut change_set: ChangeSet,
-    ) -> Result<ChangeSet, FailSet> {
-        println!("block_can_move({:?}, {:?})", index, direction);
-        let block = match self.blocks.get(index) {
-            Some(block) => block,
-            None => return Err(HashSet::new()),
-        };
-
-        // is the block even movable?
-        if !block.movable {
-            return Err(set!(index));
-        }
-
-        // does the direction match the orientation?
-        match (block.orientation, direction) {
-            (Orientation::Horizontal, PushDir::Left)
-            | (Orientation::Horizontal, PushDir::Right)
-            | (Orientation::Vertical, PushDir::Up)
-            | (Orientation::Vertical, PushDir::Down)
-            | (Orientation::Both, _) => (),
-            _ => return Err(set!(index)),
-        }
-
-        // TODO: change this to use &mut instead of returning a new one each time
-        change_set.insert(Entity::Block(index), direction);
-        for segment in block.get_segments() {
-            match self.segment_can_move(Some(index), segment, direction, change_set.clone()) {
-                Ok(new_change_set) => change_set = new_change_set,
-                Err(fail_set) => return Err(fail_set),
-            }
-        }
-
-        Ok(change_set)
-    }
-
-    fn segment_can_move(
-        &self,
-        block_index: Option<usize>,
-        segment: Segment,
-        direction: PushDir,
-        change_set: ChangeSet,
-    ) -> Result<ChangeSet, FailSet> {
-        println!(
-            "segment_can_move({:?}, {:?}, {:?})",
-            block_index, segment, direction
-        );
-        let segment_loc = (segment.position.0, segment.position.1, segment.board);
-        let target = segment_loc + direction;
-        println!(" - target: {:?}", target);
-
-        // is the target actually in the map?
-        if target.0 < 0
-            || target.0 >= self.dimensions.0 as i32
-            || target.1 < 0
-            || target.1 >= self.dimensions.1 as i32
-        {
-            return Err(entity_fail!(block_index));
-        }
-
-        // retrieve other blocks that might be occupying this current space and the target space
-        let mut current_occupant = None;
-        let mut target_occupant = None;
-        for (i, block) in self.blocks.iter().enumerate() {
-            // skip other segments of the same block
-            if let Some(n) = block_index {
-                if n == i {
-                    continue;
-                }
-            }
-
-            // offset from the change set
-            let offset = match change_set.get(&Entity::Block(i)) {
-                Some(direction) => direction.as_pair(),
-                None => (0, 0),
-            };
-
-            for segment in block.get_segments() {
-                // don't get segments on different boards
-                if segment.board != segment_loc.2 {
-                    continue;
-                }
-
-                let mut segment_pos = segment.position;
-
-                if segment_pos == (segment_loc.0, segment_loc.1) {
-                    current_occupant = Some((i, segment.shape, block.orientation));
-                }
-
-                segment_pos.0 += offset.0;
-                segment_pos.1 += offset.1;
-
-                if segment_pos == (target.0, target.1) {
-                    target_occupant = Some((Entity::Block(i), segment.shape, block.orientation));
-                }
-            }
-        }
-        // check if the target occupant is actually a player
-        if let None = target_occupant {
-            if segment.board == Board::Left && self.player1.position == (target.0, target.1) {
-                target_occupant =
-                    Some((Entity::Player(Board::Left), Shape::Full, Orientation::None));
-            } else if segment.board == Board::Right && self.player2.position == (target.0, target.1)
-            {
-                target_occupant =
-                    Some((Entity::Player(Board::Right), Shape::Full, Orientation::None));
-            }
-        }
-
-        println!(
-            " - occupants: current={:?} | target={:?}",
-            current_occupant, target_occupant
-        );
-
-        // handle special pushes
-        if let Some((other_block, other_shape, other_orientation)) = current_occupant {
-            // are both shapes triangles?
-            let both_triangles = match (segment.shape, other_shape) {
-                (Shape::Full, Shape::Full) => false,
-                (Shape::Full, _) => unreachable!("invalid to have triangle + full"),
-                (_, Shape::Full) => unreachable!("invalid to have triangle + full"),
-                _ => true,
-            };
-
-            if both_triangles {
-                // what directions could we be pushing the other block into?
-                let possible_directions = match segment.shape {
-                    Shape::TopRight => [PushDir::Up, PushDir::Right],
-                    Shape::TopLeft => [PushDir::Left, PushDir::Up],
-                    Shape::BottomLeft => [PushDir::Down, PushDir::Left],
-                    Shape::BottomRight => [PushDir::Right, PushDir::Down],
-                    Shape::Full => unreachable!("already eliminated this possibility"),
-                };
-                println!(" - possible directions: {:?}", possible_directions);
-
-                // does the direction we're pushing appear in this list?
-                if possible_directions.contains(&direction) {
-                    // the other shape goes in the other direction
-                    let other_direction = match other_orientation {
-                        Orientation::None => unreachable!("already eliminated this possibility"),
-                        Orientation::Vertical => [PushDir::Up, PushDir::Down],
-                        Orientation::Horizontal => [PushDir::Left, PushDir::Right],
-                        Orientation::Both => unimplemented!(),
-                    };
-
-                    let possible_directions = possible_directions.iter().collect::<HashSet<_>>();
-                    let other_direction = other_direction.iter().collect();
-                    let mut intersected_direction =
-                        possible_directions.intersection(&other_direction);
-                    let new_direction = **intersected_direction.next().unwrap();
-
-                    // let other_direction = {
-                    //     let mut set = possible_directions.iter().collect::<HashSet<_>>();
-                    //     set.remove(&direction);
-                    //     *set.into_iter().next().unwrap()
-                    // };
-
-                    let mut result = self.block_can_move(other_block, new_direction, change_set);
-                    if let Ok(ref mut change_set) = result {
-                        change_set.insert(Entity::Block(other_block), new_direction);
-                    }
-
-                    return result;
-                }
-            }
-        }
-
-        // handle normal pushes
-        if let Some((entity, shape, _orientation)) = target_occupant {
-            match entity {
-                Entity::Player(_) => {
-                    // TODO: assert that the board is the same
-                    Err(fail_set!(change_set))
-                }
-                Entity::Block(index) => {
-                    if
-                    // if it's part of the same block it's ok to push
-                    block_index.is_some() && block_index.unwrap() == index ||
-                    // if the shapes are opposite, we can actually both fit into the same spot
-                    segment.shape.is_opposite(shape)
-                    {
-                        Ok(change_set)
-                    }
-                    // if the block is already in the change set, it can't move
-                    else if change_set.contains_key(&Entity::Block(index)) {
-                        Err(fail_set!(change_set))
-                    }
-                    // if the next block can move then so can this one
-                    else {
-                        self.block_can_move(index, direction, change_set)
-                    }
-                }
-            }
-        } else {
-            // coast is clear, push away!
-            Ok(change_set)
-        }
-    }
-
-    pub fn render(&self, renderer: &mut Renderer, animations: &AnimationState) {
-        // board positioning calculations
-        let playfield_ratio = (2 * self.dimensions.0 + 6) as f32 / (self.dimensions.1 + 4) as f32;
-        let screen_ratio = renderer.window.0 / renderer.window.1;
-
-        let cols = self.dimensions.0 as i32;
-        let rows = self.dimensions.1 as i32;
-
-        let (scale, xoff, yoff) = if playfield_ratio > screen_ratio {
-            let scale = renderer.window.0 as i32 / (2 * cols + 6);
-            let yoff = renderer.window.1 as i32 / 2 - (rows + 4) * scale / 2;
-            (scale, 0, yoff)
-        } else {
-            let scale = renderer.window.1 as i32 / (rows + 4);
-            let xoff = renderer.window.0 as i32 / 2 - (2 * cols + 6) * scale / 2;
-            (scale, xoff, 0)
-        };
-
-        self.render_boards(renderer, scale, (xoff, yoff), animations);
-    }
-
-    fn render_boards(
-        &self,
-        renderer: &mut Renderer,
-        scale: i32,
-        offset: (i32, i32),
-        animations: &AnimationState,
-    ) {
-        let left_off = (offset.0 + 2 * scale, offset.1 + 2 * scale);
-        let right_off = (
-            offset.0 + (4 + self.dimensions.0 as i32) * scale,
-            offset.1 + 2 * scale,
-        );
-
-        // render the grid
-        // TODO: do this in one single pass instead of once for each cell
-        for x in 0..self.dimensions.0 as i32 {
-            for y in 0..self.dimensions.1 as i32 {
-                renderer.render_cell((left_off.0 + x * scale, left_off.1 + y * scale), scale);
-                renderer.render_cell((right_off.0 + x * scale, right_off.1 + y * scale), scale);
-            }
-        }
-
-        // render blocks
-        for (i, block) in self.blocks.iter().enumerate() {
-            for segment in block.get_segments().iter() {
-                let offset = match &segment.board {
-                    Board::Left => left_off,
-                    Board::Right => right_off,
-                };
-                let mut location = (
-                    offset.0 + segment.position.0 * scale,
-                    offset.1 + segment.position.1 * scale,
-                );
-                let animation_offset = animations.get_block_offset(i);
-                location.0 += (animation_offset.0 * scale as f32) as i32;
-                location.1 += (animation_offset.1 * scale as f32) as i32;
-                renderer.render_segment(
-                    location,
-                    scale,
-                    block.get_color(),
-                    block.get_orientation(),
-                    segment.shape,
-                );
-            }
-        }
-
-        // render goals
-        self.render_goal(renderer, self.goal1, scale, left_off);
-        self.render_goal(renderer, self.goal2, scale, right_off);
-
-        // render player
-        self.render_player(
-            renderer,
-            Board::Left,
-            &self.player1,
-            scale,
-            animations,
-            left_off,
-        );
-        self.render_player(
-            renderer,
-            Board::Right,
-            &self.player2,
-            scale,
-            animations,
-            right_off,
-        );
-    }
-
-    fn render_player(
-        &self,
-        renderer: &mut Renderer,
-        board: Board,
-        player: &Player,
-        scale: i32,
-        animations: &AnimationState,
-        offset: (i32, i32),
-    ) {
-        let mut location = (
-            offset.0 + player.position.0 * scale + 4,
-            offset.1 + player.position.1 * scale + 4,
-        );
-        let animation_offset = animations.get_player_offset(board);
-        location.0 += (animation_offset.0 * scale as f32) as i32;
-        location.1 += (animation_offset.1 * scale as f32) as i32;
-        renderer.render_segment(
-            location,
-            scale - 8,
-            player.color,
-            Orientation::Both,
-            Shape::Full,
-        );
-    }
-
-    fn render_goal(
-        &self,
-        renderer: &mut Renderer,
-        location: (i32, i32),
-        scale: i32,
-        offset: (i32, i32),
-    ) {
-        let position = (
-            offset.0 + location.0 * scale + 4,
-            offset.1 + location.1 * scale + 4,
-        );
-        renderer.render_segment(
-            position,
-            scale - 8,
-            Color::from_rgb_u32(102, 204, 102),
-            Orientation::Both,
-            Shape::Full,
-        );
-    }
-}
--- a/src/level/player.rs
+++ b/src/level/player.rs
@ -1,23 +0,0 @@
-use crate::color::Color;
-use crate::enums::Orientation;
-use crate::level::{Blockish, Segment};
-
-#[derive(Copy, Clone)]
-pub struct Player {
-    pub position: (i32, i32),
-    pub color: Color,
-}
-
-impl Blockish for Player {
-    fn get_color(&self) -> Color {
-        self.color
-    }
-
-    fn get_orientation(&self) -> Orientation {
-        Orientation::None
-    }
-
-    fn get_segments(&self) -> Vec<Segment> {
-        vec![]
-    }
-}
--- a/src/macros.rs
+++ b/src/macros.rs
@ -0,0 +1,30 @@
+macro_rules! set {
+	($($item:expr)*) => {
+		{
+			let mut set = std::collections::HashSet::new();
+			$(set.insert($item);)*
+			set
+		}
+	}
+}
+
+macro_rules! fail_set {
+  ($change_set:expr) => {
+    $change_set
+      .iter()
+      .filter_map(|(entity, _)| match entity {
+        Entity::Block(index) => Some(*index),
+        Entity::Player(_) => None,
+      })
+      .collect()
+  };
+}
+
+macro_rules! entity_fail {
+  ($item:expr) => {
+    match $item {
+      Some(index) => set!(index),
+      None => std::collections::HashSet::new(),
+    }
+  };
+}
--- a/src/main.rs
+++ b/src/main.rs
@ -1,87 +1,46 @@
 #[macro_use]
-extern crate glium;
-extern crate nalgebra_glm as glm;
+extern crate serde;
+
 #[macro_use]
-extern crate serde_derive;
+pub mod macros;

-mod animations;
-mod color;
-mod data;
-mod enums;
-mod game;
-mod keymap;
-mod level;
-mod renderer;
-mod resources;
-mod screens;
+pub mod animations;
+pub mod draw;
+pub mod game_state;
+pub mod screens;

-use std::time::Instant;
-use std::rc::Rc;
-use std::cell::RefCell;
-
-use glium::glutin::dpi::PhysicalSize;
-use glium::glutin::{
-    event::{Event, WindowEvent},
-    event_loop::{EventLoop, ControlFlow},
-    window::WindowBuilder,
-    ContextBuilder,
+use anyhow::Result;
+use macroquad::{
+  prelude::*,
+  ui::{hash, root_ui, widgets::Window},
 };
-use glium::{Display, Surface};
+use screens::{Screen, ScreenAction};

-use crate::game::Game;
+use crate::screens::{MenuScreen, ScreenStack};

-const GAME_WIDTH: u32 = 1024;
-const GAME_HEIGHT: u32 = 768;
+#[macroquad::main("BasicShapes")]
+async fn main() -> Result<()> {
+  let mut screen_stack = ScreenStack::with(MenuScreen::new());

-fn main() {
-    let mut event_loop = EventLoop::new();
-    let primary_monitor = match event_loop.primary_monitor() {
-        Some(v) => v,
-        None => panic!("no primary monitor"),
-    };
-    let dpi_factor = primary_monitor.scale_factor();
-    let dimensions: PhysicalSize<u32> = (GAME_WIDTH, GAME_HEIGHT).into();
+  loop {
+    clear_background(WHITE);

-    let wb = WindowBuilder::new()
-        .with_inner_size(dimensions.to_logical::<u32>(dpi_factor))
-        .with_resizable(false)
-        .with_title("wedge");
-    let cb = ContextBuilder::new();
-    let display = Display::new(wb, cb, &event_loop).unwrap();
+    Window::new(hash!(), vec2(20., 20.), vec2(120., 120.))
+      .titlebar(true)
+      .label("level control")
+      .ui(&mut root_ui(), |ui| {
+        ui.button(vec2(0., 0.), "helloge");

-    {
-        let gl_window = display.gl_window();
-        let window = gl_window.window();
-        println!("size: {:?}", window.inner_size());
-    }
+        let top = screen_stack.top();
+        let top = top.as_ref();
+        ui.label(vec2(0.0, 10.0), &format!("screen: {}", top.status()));
+      });

-    let mut game = Game::new(&display);
+    screen_stack.render();
+    screen_stack.update();

-    let mut closed = false;
-    let mut prev = Rc::new(RefCell::new(Instant::now()));
-    // while !closed {
+    next_frame().await
+  }

-    event_loop.run(move |event, _, ctrl_flow| {
-        let now = Instant::now();
-        let delta = now - *prev.borrow();
-
-        match event {
-            Event::WindowEvent {
-                event: WindowEvent::CloseRequested,
-                ..
-            } => *ctrl_flow = ControlFlow::Exit,
-            _ => game.handle_event(event),
-        };
-
-        game.update(delta);
-
-        let mut target = game.target();
-        target.clear(None, Some((0.0, 0.0, 0.0, 1.0)), true, None, None);
-        let mut renderer = game.create_renderer(&mut target);
-        game.render(&mut renderer);
-        target.finish().unwrap();
-
-        prev.replace(now);
-        std::thread::sleep(std::time::Duration::from_millis(17));
-    });
+  Ok(())
 }
--- a/src/renderer.rs
+++ b/src/renderer.rs
@ -1,229 +0,0 @@
-use glium::draw_parameters::{Blend, DrawParameters};
-use glium::index::{NoIndices, PrimitiveType};
-use glium::{Display, Frame, Program, Surface, Texture2d, VertexBuffer};
-use nalgebra::{Matrix4, Vector4};
-
-use crate::color::Color;
-use crate::enums::{Orientation, Shape};
-use crate::game::Game;
-
-pub struct Renderer<'a, 'b> {
-    pub window: (f32, f32),
-    target: &'a mut Frame,
-    display: &'b Display,
-    cell_program: &'b Program,
-    segment_program: &'b Program,
-    segment_texture: &'b Texture2d,
-}
-
-impl<'a, 'b> Renderer<'a, 'b> {
-    pub fn new(game: &'b Game, target: &'a mut Frame) -> Self {
-        Renderer {
-            window: (
-                game.resources.window_dimensions.0 as f32,
-                game.resources.window_dimensions.1 as f32,
-            ),
-            target,
-            display: &game.display,
-            cell_program: game.resources.get_shader("cell").unwrap(),
-            segment_program: game.resources.get_shader("segment").unwrap(),
-            segment_texture: game.resources.get_texture("segment").unwrap(),
-        }
-    }
-
-    pub fn render_cell(&mut self, location: (i32, i32), scale: i32) {
-        #[derive(Copy, Clone)]
-        struct Vertex {
-            point: [f32; 2],
-        }
-        implement_vertex!(Vertex, point);
-
-        let indices = NoIndices(PrimitiveType::TrianglesList);
-        let mut vertices = Vec::<Vertex>::new();
-        vertices.push(Vertex { point: [0.0, 0.0] });
-        vertices.push(Vertex { point: [1.0, 0.0] });
-        vertices.push(Vertex { point: [0.0, 1.0] });
-        vertices.push(Vertex { point: [1.0, 1.0] });
-        vertices.push(Vertex { point: [0.0, 1.0] });
-        vertices.push(Vertex { point: [1.0, 0.0] });
-        let vertex_buffer = VertexBuffer::new(self.display, &vertices).unwrap();
-
-        let projection = glm::ortho::<f32>(
-            0.0,
-            self.window.0 as f32,
-            self.window.1 as f32,
-            0.0,
-            -1.0,
-            1.0,
-        );
-        let mut matrix = Matrix4::<f32>::identity();
-        matrix = matrix.append_nonuniform_scaling(&[scale as f32, scale as f32, 1.0].into());
-        matrix = matrix.append_translation(&[location.0 as f32, location.1 as f32, 0.0].into());
-
-        let color = Vector4::from([0.6, 0.6, 0.8, 1.0f32]);
-
-        let uniforms = uniform! {
-            target: *matrix.as_ref(),
-            projection: *projection.as_ref(),
-            color: *color.as_ref(),
-        };
-
-        self.target
-            .draw(
-                &vertex_buffer,
-                &indices,
-                &self.cell_program,
-                &uniforms,
-                &DrawParameters {
-                    blend: Blend::alpha_blending(),
-                    ..Default::default()
-                },
-            )
-            .unwrap();
-    }
-
-    pub fn render_segment(
-        &mut self,
-        location: (i32, i32),
-        scale: i32,
-        color: Color,
-        orientation: Orientation,
-        shape: Shape,
-    ) {
-        #[derive(Copy, Clone)]
-        struct Vertex {
-            pos: [f32; 2],
-            tex: [f32; 2],
-        }
-        implement_vertex!(Vertex, pos, tex);
-
-        let indices = NoIndices(PrimitiveType::TrianglesList);
-        let mut vertices = Vec::new();
-        match shape {
-            Shape::BottomLeft => {
-                vertices.push(Vertex {
-                    pos: [1.0, 1.0],
-                    tex: [1.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 0.0],
-                    tex: [1.0, 0.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 0.0],
-                    tex: [0.0, 0.0],
-                });
-            }
-            Shape::TopLeft => {
-                vertices.push(Vertex {
-                    pos: [0.0, 1.0],
-                    tex: [0.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 1.0],
-                    tex: [1.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 0.0],
-                    tex: [1.0, 0.0],
-                });
-            }
-            Shape::TopRight => {
-                vertices.push(Vertex {
-                    pos: [1.0, 1.0],
-                    tex: [1.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 1.0],
-                    tex: [0.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 0.0],
-                    tex: [0.0, 0.0],
-                });
-            }
-            Shape::BottomRight => {
-                vertices.push(Vertex {
-                    pos: [0.0, 1.0],
-                    tex: [0.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 0.0],
-                    tex: [1.0, 0.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 0.0],
-                    tex: [0.0, 0.0],
-                });
-            }
-            _ => {
-                vertices.push(Vertex {
-                    pos: [0.0, 1.0],
-                    tex: [0.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 0.0],
-                    tex: [1.0, 0.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 0.0],
-                    tex: [0.0, 0.0],
-                });
-                vertices.push(Vertex {
-                    pos: [0.0, 1.0],
-                    tex: [0.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 1.0],
-                    tex: [1.0, 1.0],
-                });
-                vertices.push(Vertex {
-                    pos: [1.0, 0.0],
-                    tex: [1.0, 0.0],
-                });
-            }
-        }
-        let vertex_buffer = VertexBuffer::new(self.display, &vertices).unwrap();
-        let tint = Vector4::from([color.0, color.1, color.2, 1.0f32]);
-
-        let projection = glm::ortho::<f32>(
-            0.0,
-            self.window.0 as f32,
-            self.window.1 as f32,
-            0.0,
-            -1.0,
-            1.0,
-        );
-        let mut matrix = Matrix4::<f32>::identity();
-        matrix = matrix.append_nonuniform_scaling(&[scale as f32, scale as f32, 1.0].into());
-        matrix = matrix.append_translation(&[location.0 as f32, location.1 as f32, 0.0].into());
-
-        let rotate_texture = match orientation {
-            Orientation::Both => false,
-            Orientation::None => false,
-            Orientation::Vertical => true,
-            Orientation::Horizontal => false,
-        };
-
-        let uniforms = uniform! {
-            target: *matrix.as_ref(),
-            rotate_texture: rotate_texture,
-            projection: *projection.as_ref(),
-            tint: *tint.as_ref(),
-            tex: self.segment_texture,
-        };
-
-        self.target
-            .draw(
-                &vertex_buffer,
-                &indices,
-                &self.segment_program,
-                &uniforms,
-                &DrawParameters {
-                    blend: Blend::alpha_blending(),
-                    ..Default::default()
-                },
-            )
-            .unwrap();
-    }
-}
--- a/src/resources.rs
+++ b/src/resources.rs
@ -1,66 +0,0 @@
-use std::collections::HashMap;
-
-use glium::texture::RawImage2d;
-use glium::{Display, Program, ProgramCreationError, Texture2d};
-use image::{DynamicImage, GenericImageView, ImageError};
-
-#[derive(Default)]
-pub struct Resources {
-    pub window_dimensions: (u32, u32),
-    textures: HashMap<String, Texture2d>,
-    shaders: HashMap<String, Program>,
-}
-
-impl Resources {
-    pub fn load_image_from_memory(
-        &mut self,
-        display: &Display,
-        name: impl AsRef<str>,
-        buffer: &[u8],
-        alpha: bool,
-    ) -> Result<(), ImageError> {
-        let image = image::load_from_memory(buffer)?;
-        self.load_image(display, name, image, alpha);
-        Ok(())
-    }
-
-    pub fn load_image(
-        &mut self,
-        display: &Display,
-        name: impl AsRef<str>,
-        image: DynamicImage,
-        alpha: bool,
-    ) {
-        let name = name.as_ref().to_owned();
-        let dimensions = image.dimensions();
-        let image = if alpha {
-            RawImage2d::from_raw_rgba_reversed(image.as_bytes(), dimensions)
-        } else {
-            RawImage2d::from_raw_rgb_reversed(image.as_bytes(), dimensions)
-        };
-        // TODO: don't unwrap
-        let texture = Texture2d::new(display, image).unwrap();
-        self.textures.insert(name, texture);
-    }
-
-    pub fn get_texture(&self, name: impl AsRef<str>) -> Option<&Texture2d> {
-        self.textures.get(name.as_ref())
-    }
-
-    pub fn load_shader(
-        &mut self,
-        display: &Display,
-        name: impl AsRef<str>,
-        vertex: &str,
-        fragment: &str,
-    ) -> Result<(), ProgramCreationError> {
-        let name = name.as_ref().to_owned();
-        let program = Program::from_source(display, vertex, fragment, None)?;
-        self.shaders.insert(name, program);
-        Ok(())
-    }
-
-    pub fn get_shader(&self, name: impl AsRef<str>) -> Option<&Program> {
-        self.shaders.get(name.as_ref())
-    }
-}
--- a/src/screens/menu.rs
+++ b/src/screens/menu.rs
@ -1,25 +1,27 @@
-use std::time::Duration;
+use macroquad::{input::is_key_pressed, miniquad::KeyCode};

-use glium::glutin::event::VirtualKeyCode;
-
-use crate::keymap::Keymap;
+// use crate::keymap::Keymap;
 use crate::screens::{PlayScreen, Screen, ScreenAction};

 pub struct MenuScreen;

 impl Screen for MenuScreen {
-    fn update(&mut self, delta: Duration, keymap: &Keymap) -> ScreenAction {
-        if keymap.is_pressed(VirtualKeyCode::Space) {
-            let play_screen = PlayScreen::new();
-            ScreenAction::Push(Box::new(play_screen))
-        } else {
-            ScreenAction::None
-        }
+  fn status(&self) -> String {
+    format!("menu screen")
+  }
+
+  fn update(&mut self) -> ScreenAction {
+    if is_key_pressed(KeyCode::Space) {
+      let play_screen = PlayScreen::new();
+      ScreenAction::Push(Box::new(play_screen))
+    } else {
+      ScreenAction::None
    }
+  }
 }

 impl MenuScreen {
-    pub fn new() -> MenuScreen {
-        MenuScreen
-    }
+  pub fn new() -> MenuScreen {
+    MenuScreen
+  }
 }
--- a/src/screens/mod.rs
+++ b/src/screens/mod.rs
@ -1,62 +1,59 @@
 mod menu;
 mod play;

-use std::time::Duration;
-
-use crate::keymap::Keymap;
-use crate::renderer::Renderer;
-
 pub use self::menu::MenuScreen;
 pub use self::play::PlayScreen;

 pub trait Screen {
-    fn update(&mut self, delta: Duration, keymap: &Keymap) -> ScreenAction {
-        ScreenAction::None
-    }
+  fn status(&self) -> String;

-    fn render(&self, renderer: &mut Renderer) {}
+  fn update(&mut self) -> ScreenAction {
+    ScreenAction::None
+  }
+
+  fn render(&self) {}
 }

 pub enum ScreenAction {
-    None,
-    Push(Box<dyn Screen>),
+  None,
+  Push(Box<dyn Screen>),
 }

 pub struct ScreenStack(Vec<Box<dyn Screen>>);

 impl ScreenStack {
-    pub fn with<S: 'static + Screen>(screen: S) -> Self {
-        let mut stack = Vec::<Box<dyn Screen>>::new();
-        stack.push(Box::new(screen));
-        ScreenStack(stack)
-    }
+  pub fn with<S: Screen + 'static>(screen: S) -> Self {
+    let mut stack = Vec::<Box<dyn Screen>>::new();
+    stack.push(Box::new(screen));
+    ScreenStack(stack)
+  }

-    pub fn top(&self) -> impl AsRef<dyn Screen + 'static> + '_ {
-        self.0.last().unwrap()
-    }
+  pub fn top(&self) -> impl AsRef<dyn Screen + 'static> + '_ {
+    self.0.last().unwrap()
+  }

-    pub fn top_mut(&mut self) -> impl AsMut<dyn Screen + 'static> + '_ {
-        self.0.last_mut().unwrap()
-    }
+  pub fn top_mut(&mut self) -> impl AsMut<dyn Screen + 'static> + '_ {
+    self.0.last_mut().unwrap()
+  }

-    pub fn update(&mut self, delta: Duration, keymap: &Keymap) {
-        let result = {
-            let mut screen = self.top_mut();
-            let screen = screen.as_mut();
-            screen.update(delta, keymap)
-        };
-        match result {
-            ScreenAction::None => (),
-            ScreenAction::Push(new_screen) => {
-                println!("pushed new screen");
-                self.0.push(new_screen);
-            }
-        }
+  pub fn update(&mut self) {
+    let result = {
+      let mut screen = self.top_mut();
+      let screen = screen.as_mut();
+      screen.update()
+    };
+    match result {
+      ScreenAction::None => (),
+      ScreenAction::Push(new_screen) => {
+        println!("pushed new screen");
+        self.0.push(new_screen);
+      }
    }
+  }

-    pub fn render(&self, renderer: &mut Renderer) {
-        let screen = self.top();
-        let screen = screen.as_ref();
-        screen.render(renderer)
-    }
+  pub fn render(&self) {
+    let screen = self.top();
+    let screen = screen.as_ref();
+    screen.render()
+  }
 }
--- a/src/screens/play.rs
+++ b/src/screens/play.rs
@ -1,127 +1,136 @@
 use std::time::Duration;

-use glium::glutin::event::VirtualKeyCode;
+use macroquad::{
+  input::is_key_pressed, miniquad::KeyCode, time::get_frame_time,
+};

-use crate::animations::AnimationState;
-use crate::enums::{Board, PushDir};
-use crate::keymap::Keymap;
-use crate::level::Level;
-use crate::renderer::Renderer;
-use crate::screens::{Screen, ScreenAction};
+use crate::{
+  animations::AnimationState,
+  game_state::{Board, LevelData, LevelState, PushDir},
+  screens::{Screen, ScreenAction},
+};

 const LEVEL_TUTORIAL: &str = include_str!("../../levels/tutorial.json");
 const LEVEL_TUTORIAL2: &str = include_str!("../../levels/tutorial2.json");
 const LEVEL_1: &str = include_str!("../../levels/level1.json");

 pub struct PlayScreen {
-    animations: AnimationState,
-    levels: Vec<&'static str>,
-    current_level: Level,
-    current_level_idx: usize,
+  animations: AnimationState,
+  levels: Vec<&'static str>,
+  current_level: LevelState,
+  current_level_idx: usize,
 }

 impl Screen for PlayScreen {
-    fn update(&mut self, delta: Duration, keymap: &Keymap) -> ScreenAction {
-        macro_rules! btn_handler {
-            ($key:expr, $board:expr, $direction:expr) => {
-                if keymap.is_pressed($key) {
-                    println!("pushed: {:?}", $key);
-                    let level = self.get_current_level_mut();
-                    let result = level.try_move($board, $direction);
-                    self.animations.begin_move_transition(result);
-                }
-            };
+  fn status(&self) -> String {
+    format!("play screen")
+  }
+
+  fn update(&mut self) -> ScreenAction {
+    macro_rules! btn_handler {
+      ($key:expr, $board:expr, $direction:expr) => {
+        if is_key_pressed($key) {
+          println!("pushed: {:?}", $key);
+          let level = self.get_current_level_mut();
+          let result = level.try_move($board, $direction);
+          self.animations.begin_move_transition(result);
        }
-
-        if self.animations.is_animating {
-            // println!("animating. {:?}", self.animations.progress);
-            self.animations.make_progress(delta);
-
-            // we just finished!
-            if !self.animations.is_animating {
-                // apply the changes to the entities
-                // this indirection is used to dodge a concurrent borrow
-                let change_set = if let Some(Ok(change_set)) = &self.animations.last_move_result {
-                    Some(change_set.clone())
-                } else {
-                    None
-                };
-                if let Some(change_set) = change_set {
-                    let level = self.get_current_level_mut();
-                    level.apply_change_set(change_set.clone());
-                    self.check_win_condition();
-                }
-            }
-        } else {
-            btn_handler!(VirtualKeyCode::W, Board::Left, PushDir::Up);
-            btn_handler!(VirtualKeyCode::A, Board::Left, PushDir::Left);
-            btn_handler!(VirtualKeyCode::S, Board::Left, PushDir::Down);
-            btn_handler!(VirtualKeyCode::D, Board::Left, PushDir::Right);
-
-            btn_handler!(VirtualKeyCode::I, Board::Right, PushDir::Up);
-            btn_handler!(VirtualKeyCode::J, Board::Right, PushDir::Left);
-            btn_handler!(VirtualKeyCode::K, Board::Right, PushDir::Down);
-            btn_handler!(VirtualKeyCode::L, Board::Right, PushDir::Right);
-
-            if keymap.is_pressed(VirtualKeyCode::R) {
-                // restart the level
-                self.restart_level();
-            }
-        }
-
-        ScreenAction::None
+      };
    }

-    fn render(&self, renderer: &mut Renderer) {
-        let level = self.get_current_level();
-        level.render(renderer, &self.animations);
+    if self.animations.is_animating {
+      let delta = Duration::from_secs_f32(get_frame_time());
+      self.animations.make_progress(delta);
+
+      // we just finished!
+      if !self.animations.is_animating {
+        // apply the changes to the entities
+        // this indirection is used to dodge a concurrent borrow
+        let change_set =
+          if let Some(Ok(change_set)) = &self.animations.last_move_result {
+            Some(change_set.clone())
+          } else {
+            None
+          };
+        if let Some(change_set) = change_set {
+          let level = self.get_current_level_mut();
+          level.apply_change_set(change_set.clone());
+          self.check_win_condition();
+        }
+      }
+    } else {
+      btn_handler!(KeyCode::W, Board::Left, PushDir::Up);
+      btn_handler!(KeyCode::A, Board::Left, PushDir::Left);
+      btn_handler!(KeyCode::S, Board::Left, PushDir::Down);
+      btn_handler!(KeyCode::D, Board::Left, PushDir::Right);
+
+      btn_handler!(KeyCode::I, Board::Right, PushDir::Up);
+      btn_handler!(KeyCode::J, Board::Right, PushDir::Left);
+      btn_handler!(KeyCode::K, Board::Right, PushDir::Down);
+      btn_handler!(KeyCode::L, Board::Right, PushDir::Right);
+
+      if is_key_pressed(KeyCode::R) {
+        // restart the level
+        self.restart_level();
+      }
    }
+
+    ScreenAction::None
+  }
+
+  fn render(&self) {
+    let level = self.get_current_level();
+    level.render(&self.animations);
+  }
 }

 impl PlayScreen {
-    pub fn get_current_level(&self) -> &Level {
-        &self.current_level
-    }
+  pub fn get_current_level(&self) -> &LevelState {
+    &self.current_level
+  }

-    pub fn get_current_level_mut(&mut self) -> &mut Level {
-        &mut self.current_level
-    }
+  pub fn get_current_level_mut(&mut self) -> &mut LevelState {
+    &mut self.current_level
+  }

-    pub fn new() -> PlayScreen {
-        let levels = vec![LEVEL_TUTORIAL, LEVEL_TUTORIAL2, LEVEL_1];
+  pub fn new() -> PlayScreen {
+    let levels = vec![LEVEL_TUTORIAL, LEVEL_TUTORIAL2, LEVEL_1];

-        PlayScreen {
-            levels,
-            current_level: Level::from_json(&LEVEL_TUTORIAL),
-            current_level_idx: 0,
-            animations: AnimationState::new(),
-        }
+    PlayScreen {
+      levels,
+      current_level: LevelState::new(
+        LevelData::load_from_string(&LEVEL_TUTORIAL).unwrap(),
+      ),
+      current_level_idx: 0,
+      animations: AnimationState::new(),
    }
+  }

-    fn restart_level(&mut self) {
-        self.switch_to_level(self.current_level_idx);
-    }
+  fn restart_level(&mut self) {
+    self.switch_to_level(self.current_level_idx);
+  }

-    fn switch_to_level(&mut self, idx: usize) {
-        self.current_level = Level::from_json(self.levels[idx]);
-        self.current_level_idx = idx;
-    }
+  fn switch_to_level(&mut self, idx: usize) {
+    self.current_level =
+      LevelState::new(LevelData::load_from_string(&self.levels[idx]).unwrap());
+    self.current_level_idx = idx;
+  }

-    fn go_to_next_level(&mut self) {
-        // TODO: make an actual win screen
-        let next_level = if self.current_level_idx + 1 >= self.levels.len() {
-            0
-        } else {
-            self.current_level_idx + 1
-        };
-        self.switch_to_level(next_level);
-    }
+  fn go_to_next_level(&mut self) {
+    // TODO: make an actual win screen
+    let next_level = if self.current_level_idx + 1 >= self.levels.len() {
+      0
+    } else {
+      self.current_level_idx + 1
+    };
+    self.switch_to_level(next_level);
+  }

-    fn check_win_condition(&mut self) {
-        let level = self.get_current_level();
-        if level.check_win_condition() {
-            // go on to the next level
-            self.go_to_next_level();
-        }
+  fn check_win_condition(&mut self) {
+    let level = self.get_current_level();
+    if level.check_win_condition() {
+      // go on to the next level
+      self.go_to_next_level();
    }
+  }
 }
--- a/textures/segment.png
+++ b/textures/segment.png