40 changed files with 2680 additions and 1507 deletions
--- a/.cargo/config
+++ b/.cargo/config
@ -1,2 +0,0 @@
-[alias]
-run-wasm = "run --release --package run-wasm --"
--- a/.envrc
+++ b/.envrc
@ -1 +0,0 @@
-# use flake
--- a/.gitignore
+++ b/.gitignore
@ -1,17 +1,2 @@
 /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
@ -1,13 +1,19 @@
 [package]
 name = "wedge"
 version = "0.1.0"
-edition = "2021"
+authors = ["Michael Zhang <iptq@protonmail.com>"]
+edition = "2018"

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

 [dependencies]
-anyhow = "1.0.79"
-json5 = "0.4.1"
-macroquad = "0.4.4"
-serde = { version = "1.0.195", features = ["derive"] }
-serde_json = "1.0.111"
+glium = "0.25"
+image = "0.21"
+json5 = "0.2"
+nalgebra = "0.18"
+nalgebra-glm = "0.4"
+serde = "1.0"
+serde_derive = "1.0"
--- a/19
+++ b/19
@ -0,0 +1,19 @@
+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
@ -0,0 +1,38 @@
+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
@ -1,12 +0,0 @@
-{ 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
@ -1,97 +0,0 @@
-{
-  "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
@ -1,64 +0,0 @@
-{
-  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/rustfmt.toml
+++ b/rustfmt.toml
@ -1,4 +0,0 @@
-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
@ -0,0 +1,22 @@
+#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
@ -0,0 +1,12 @@
+#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
@ -0,0 +1,11 @@
+#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
@ -0,0 +1,13 @@
+#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
@ -1,116 +1,110 @@
 use std::collections::{HashMap, HashSet};
 use std::time::Duration;

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

 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);
-          }
+        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;
        }

-        // 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));
-          }
+        if self.progress > 1.0 {
+            self.is_animating = false;
+            self.block_offsets = BlockOffsets::new();
        }
-      }
-      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;
    }

-    if self.progress > 1.0 {
-      self.is_animating = false;
-      self.block_offsets = BlockOffsets::new();
+    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_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))
-  }
+    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
@ -0,0 +1,14 @@
+#[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
@ -0,0 +1,23 @@
+#[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
@ -1 +0,0 @@
-pub fn draw() {}
--- a/src/enums.rs
+++ b/src/enums.rs
@ -0,0 +1,109 @@
+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
@ -0,0 +1,78 @@
+use std::time::Duration;
+
+use glium::glutin::{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 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
@ -1,35 +0,0 @@
-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
@ -1,48 +0,0 @@
-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
@ -1,197 +0,0 @@
-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
@ -1,245 +0,0 @@
-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
@ -1,183 +0,0 @@
-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
@ -0,0 +1,27 @@
+use std::collections::HashMap;
+
+use glium::glutin::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
@ -0,0 +1,60 @@
+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
@ -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/level/mod.rs
+++ b/src/level/mod.rs
@ -0,0 +1,465 @@
+#[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
@ -0,0 +1,23 @@
+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
@ -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/main.rs
+++ b/src/main.rs
@ -1,46 +1,75 @@
 #[macro_use]
-extern crate serde;
-
+extern crate glium;
+extern crate nalgebra_glm as glm;
 #[macro_use]
-pub mod macros;
+extern crate serde_derive;

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

-use anyhow::Result;
-use macroquad::{
-  prelude::*,
-  ui::{hash, root_ui, widgets::Window},
-};
-use screens::{Screen, ScreenAction};
+use std::time::Instant;

-use crate::screens::{MenuScreen, ScreenStack};
+use glium::glutin::dpi::PhysicalSize;
+use glium::glutin::{ContextBuilder, Event, EventsLoop, WindowBuilder, WindowEvent};
+use glium::{Display, Surface};

-#[macroquad::main("BasicShapes")]
-async fn main() -> Result<()> {
-  let mut screen_stack = ScreenStack::with(MenuScreen::new());
+use crate::game::Game;

-  loop {
-    clear_background(WHITE);
+const GAME_WIDTH: u32 = 1024;
+const GAME_HEIGHT: u32 = 768;

-    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");
+fn main() {
+    let mut events_loop = EventsLoop::new();
+    let primary_monitor = events_loop.get_primary_monitor();
+    let dpi_factor = primary_monitor.get_hidpi_factor();
+    let dimensions: PhysicalSize = (GAME_WIDTH, GAME_HEIGHT).into();

-        let top = screen_stack.top();
-        let top = top.as_ref();
-        ui.label(vec2(0.0, 10.0), &format!("screen: {}", top.status()));
-      });
+    let wb = WindowBuilder::new()
+        .with_dimensions(dimensions.to_logical(dpi_factor))
+        .with_resizable(false)
+        .with_title("wedge");
+    let cb = ContextBuilder::new();
+    let display = Display::new(wb, cb, &events_loop).unwrap();

-    screen_stack.render();
-    screen_stack.update();
+    {
+        let gl_window = display.gl_window();
+        let window = gl_window.window();
+        println!("size: {:?}", window.get_inner_size());
+    }

-    next_frame().await
-  }
+    let mut game = Game::new(&display);

-  Ok(())
+    let mut closed = false;
+    let mut prev = Instant::now();
+    while !closed {
+        let now = Instant::now();
+        let delta = now - prev;
+
+        events_loop.poll_events(|event| match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => closed = true,
+            _ => game.handle_event(event),
+        });
+
+        game.update(delta);
+
+        let mut target = display.draw();
+        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 = now;
+        std::thread::sleep(std::time::Duration::from_millis(17));
+    }
 }
--- a/src/renderer.rs
+++ b/src/renderer.rs
@ -0,0 +1,229 @@
+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
@ -0,0 +1,66 @@
+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.raw_pixels(), dimensions)
+        } else {
+            RawImage2d::from_raw_rgb_reversed(&image.raw_pixels(), 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
@ -1,27 +1,25 @@
-use macroquad::{input::is_key_pressed, miniquad::KeyCode};
+use std::time::Duration;

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

 pub struct MenuScreen;

 impl Screen for MenuScreen {
-  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
+    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
+        }
    }
-  }
 }

 impl MenuScreen {
-  pub fn new() -> MenuScreen {
-    MenuScreen
-  }
+    pub fn new() -> MenuScreen {
+        MenuScreen
+    }
 }
--- a/src/screens/mod.rs
+++ b/src/screens/mod.rs
@ -1,59 +1,62 @@
 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 status(&self) -> String;
+    fn update(&mut self, delta: Duration, keymap: &Keymap) -> ScreenAction {
+        ScreenAction::None
+    }

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

 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: 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_mut(&mut self) -> impl AsMut<dyn Screen + 'static> + '_ {
-    self.0.last_mut().unwrap()
-  }
-
-  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 with<S: 'static + Screen>(screen: S) -> Self {
+        let mut stack = Vec::<Box<dyn Screen>>::new();
+        stack.push(Box::new(screen));
+        ScreenStack(stack)
    }
-  }

-  pub fn render(&self) {
-    let screen = self.top();
-    let screen = screen.as_ref();
-    screen.render()
-  }
+    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 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 render(&self, renderer: &mut Renderer) {
+        let screen = self.top();
+        let screen = screen.as_ref();
+        screen.render(renderer)
+    }
 }
--- a/src/screens/play.rs
+++ b/src/screens/play.rs
@ -1,136 +1,131 @@
 use std::time::Duration;

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

-use crate::{
-  animations::AnimationState,
-  game_state::{Board, LevelData, LevelState, PushDir},
-  screens::{Screen, ScreenAction},
-};
+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};

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

 impl Screen for PlayScreen {
-  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, $direction);
-          self.animations.begin_move_transition(result);
+    fn update(&mut self, delta: Duration, keymap: &Keymap) -> ScreenAction {
+        macro_rules! btn_handler {
+            ($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);
+                }
+            };
        }
-      };
+
+        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
    }

-    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();
-      }
+    fn render(&self, renderer: &mut Renderer) {
+        let level = self.get_current_level();
+        level.render(renderer, &self.animations);
    }
-
-    ScreenAction::None
-  }
-
-  fn render(&self) {
-    let level = self.get_current_level();
-    level.render(&self.animations);
-  }
 }

 impl PlayScreen {
-  pub fn get_current_level(&self) -> &LevelState {
-    &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];
-
-    PlayScreen {
-      levels,
-      current_level: LevelState::new(
-        LevelData::load_from_string(&LEVEL_TUTORIAL).unwrap(),
-      ),
-      current_level_idx: 0,
-      animations: AnimationState::new(),
+    pub fn get_current_level(&self) -> &Level {
+        &self.current_level
    }
-  }

-  fn restart_level(&mut self) {
-    self.switch_to_level(self.current_level_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 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();
+    pub fn get_current_level_mut(&mut self) -> &mut Level {
+        &mut self.current_level
+    }
+
+    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(),
+        }
+    }
+
+    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 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();
+        }
    }
-  }
 }
--- a/textures/segment.png
+++ b/textures/segment.png