diff --git a/Cargo.lock b/Cargo.lock
index bafd535..c19436a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -82,9 +82,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee67c11feeac938fae061b232e38e0b6d94f97a9df10e6271319325ac4c56a86"
+checksum = "afddf7f520a80dbf76e6f50a35bca42a2331ef227a28b3b6dc5c2e2338d114b1"
 
 [[package]]
 name = "approx"
@@ -522,6 +522,17 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "derive_more"
+version = "0.99.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41cb0e6161ad61ed084a36ba71fbba9e3ac5aee3606fb607fe08da6acbcf3d8c"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.8",
+ "syn 1.0.58",
+]
+
 [[package]]
 name = "directories"
 version = "2.0.2"
@@ -588,6 +599,16 @@ dependencies = [
  "structopt",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26ecb66b4bdca6c1409b40fb255eefc2bd4f6d135dab3c3124f80ffa2a9661e"
+dependencies = [
+ "log",
+ "regex",
+]
+
 [[package]]
 name = "error-chain"
 version = "0.12.4"
@@ -669,6 +690,17 @@ dependencies = [
  "wasi 0.9.0+wasi-snapshot-preview1",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4060f4657be78b8e766215b02b18a2e862d83745545de804638e2b545e81aee6"
+dependencies = [
+ "cfg-if 1.0.0",
+ "libc",
+ "wasi 0.10.1+wasi-snapshot-preview1",
+]
+
 [[package]]
 name = "gfx"
 version = "0.18.2"
@@ -1075,17 +1107,19 @@ checksum = "c7d73b3f436185384286bd8098d17ec07c9a7d2388a6599f824d8502b529702a"
 
 [[package]]
 name = "libosu"
-version = "0.0.15"
-source = "git+https://github.com/iptq/libosu?rev=557d0a321405516f12c3939c1207c7341f796f35#557d0a321405516f12c3939c1207c7341f796f35"
+version = "0.0.16"
+source = "git+https://github.com/iptq/libosu?rev=df7ffa4b51328479addde0804930ec76112b3b69#df7ffa4b51328479addde0804930ec76112b3b69"
 dependencies = [
- "anyhow",
  "bitflags",
+ "derive_more",
  "lazy_static",
  "num",
  "num-derive 0.3.3",
  "num-rational 0.3.2",
  "num-traits 0.2.14",
  "ordered-float 2.0.1",
+ "quickcheck",
+ "quickcheck_macros",
  "regex",
  "serde",
  "serde_json",
@@ -1128,9 +1162,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.11"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
+checksum = "fcf3805d4480bb5b86070dcfeb9e2cb2ebc148adb753c5cca5f884d1d65a42b2"
 dependencies = [
  "cfg-if 0.1.10",
 ]
@@ -1563,7 +1597,7 @@ dependencies = [
  "cfg-if 0.1.10",
  "cloudabi",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "rustc_version",
  "smallvec",
  "winapi",
@@ -1681,6 +1715,28 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "quickcheck"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03e10546770d370e4eb8ac183a4bdbf9044059afdcbbba3c98627412f93461e3"
+dependencies = [
+ "env_logger",
+ "log",
+ "rand 0.8.2",
+]
+
+[[package]]
+name = "quickcheck_macros"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b22a693222d716a9587786f37ac3f6b4faedb5b80c23914e7303ff5a1d8016e9"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.8",
+ "syn 1.0.58",
+]
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -1724,13 +1780,25 @@ version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
 dependencies = [
- "getrandom",
+ "getrandom 0.1.16",
  "libc",
  "rand_chacha 0.2.2",
  "rand_core 0.5.1",
  "rand_hc 0.2.0",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18519b42a40024d661e1714153e9ad0c3de27cd495760ceb09710920f1098b1e"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.0",
+ "rand_core 0.6.1",
+ "rand_hc 0.3.0",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.1.1"
@@ -1751,6 +1819,16 @@ dependencies = [
  "rand_core 0.5.1",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.1",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.3.1"
@@ -1772,7 +1850,16 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 dependencies = [
- "getrandom",
+ "getrandom 0.1.16",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c026d7df8b298d90ccbbc5190bd04d85e159eaf5576caeacf8741da93ccbd2e5"
+dependencies = [
+ "getrandom 0.2.1",
 ]
 
 [[package]]
@@ -1793,6 +1880,15 @@ dependencies = [
  "rand_core 0.5.1",
 ]
 
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core 0.6.1",
+]
+
 [[package]]
 name = "rand_isaac"
 version = "0.1.1"
@@ -1876,14 +1972,23 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05ec8ca9416c5ea37062b502703cd7fcb207736bc294f6e0cf367ac6fc234570"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de0737333e7a9502c789a36d7c7fa6092a49895d4faa31ca5df163857ded2e9d"
 dependencies = [
- "getrandom",
- "redox_syscall",
+ "getrandom 0.1.16",
+ "redox_syscall 0.1.57",
  "rust-argon2",
 ]
 
@@ -2037,18 +2142,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.118"
+version = "1.0.119"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06c64263859d87aa2eb554587e2d23183398d617427327cf2b3d0ed8c69e4800"
+checksum = "9bdd36f49e35b61d49efd8aa7fc068fd295961fd2286d0b2ee9a4c7a14e99cc3"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.118"
+version = "1.0.119"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c84d3526699cd55261af4b941e4e725444df67aa4f9e6a3564f18030d12672df"
+checksum = "552954ce79a059ddd5fd68c271592374bd15cab2274970380c000118aeffe1cd"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
@@ -2177,9 +2282,9 @@ dependencies = [
 
 [[package]]
 name = "stderrlog"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b02f316286ae558d83acc93dd81eaba096e746987a7961d4a9ae026842bae67f"
+checksum = "45a53e2eff3e94a019afa6265e8ee04cb05b9d33fe9f5078b14e4e391d155a38"
 dependencies = [
  "atty",
  "chrono",
@@ -2299,14 +2404,14 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.1.0"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
+checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "libc",
- "rand 0.7.3",
- "redox_syscall",
+ "rand 0.8.2",
+ "redox_syscall 0.2.4",
  "remove_dir_all",
  "winapi",
 ]
@@ -2372,12 +2477,11 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.1.44"
+version = "0.1.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
+checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
 dependencies = [
  "libc",
- "wasi 0.10.0+wasi-snapshot-preview1",
  "winapi",
 ]
 
@@ -2433,9 +2537,9 @@ checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
 
 [[package]]
 name = "uuid"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fde2f6a4bea1d6e007c4ad38c6839fa71cbb63b6dbf5b595aa38dc9b1093c11"
+checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
 
 [[package]]
 name = "vec_map"
@@ -2474,9 +2578,9 @@ checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasi"
-version = "0.10.0+wasi-snapshot-preview1"
+version = "0.10.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+checksum = "93c6c3420963c5c64bca373b25e77acb562081b9bb4dd5bb864187742186cea9"
 
 [[package]]
 name = "wasm-bindgen"
diff --git a/Cargo.toml b/Cargo.toml
index a6dec7b..8fa2564 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,18 +14,18 @@ members = [
 ]
 
 [dependencies]
-anyhow = "1.0.37"
+anyhow = "1.0.38"
 bass-sys = { path = "bass-sys" }
 ggez = "0.5.1"
-log = "0.4.11"
-stderrlog = "0.5.0"
+log = "0.4.13"
+stderrlog = "0.5.1"
 num = "0.3.1"
 ordered-float = "2.0.1"
 structopt = "0.3.21"
 
 [dependencies.libosu]
 git = "https://github.com/iptq/libosu"
-rev = "557d0a321405516f12c3939c1207c7341f796f35"
+rev = "df7ffa4b51328479addde0804930ec76112b3b69"
 
 [features]
 clippy = []
diff --git a/framework/Cargo.toml b/framework/Cargo.toml
index 2901370..40cbec9 100644
--- a/framework/Cargo.toml
+++ b/framework/Cargo.toml
@@ -4,6 +4,4 @@ version = "0.1.0"
 authors = ["Michael Zhang <mail@mzhang.io>"]
 edition = "2018"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
diff --git a/framework/src/lib.rs b/framework/src/lib.rs
index e69de29..8b13789 100644
--- a/framework/src/lib.rs
+++ b/framework/src/lib.rs
@@ -0,0 +1 @@
+
diff --git a/framework/src/renderer.rs b/framework/src/renderer.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/audio.rs b/src/audio.rs
index 21e1987..4982fe3 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -4,6 +4,8 @@ use std::ptr;
 
 use anyhow::Result;
 use bass::constants::*;
+use libosu::timing::TimestampSec;
+use ordered_float::NotNan;
 
 pub struct AudioEngine {
     current_device: AudioDevice,
diff --git a/src/game/mod.rs b/src/game/mod.rs
index 02019aa..9d657c1 100644
--- a/src/game/mod.rs
+++ b/src/game/mod.rs
@@ -7,6 +7,7 @@ use std::collections::{HashMap, HashSet};
 use std::fs::File;
 use std::io::Read;
 use std::path::Path;
+use std::str::FromStr;
 
 use anyhow::Result;
 use ggez::{
@@ -86,7 +87,7 @@ impl Game {
         let mut contents = String::new();
         file.read_to_string(&mut contents)?;
 
-        let beatmap = Beatmap::from_osz(&contents)?;
+        let beatmap = Beatmap::from_str(&contents)?;
         self.beatmap = BeatmapExt::new(beatmap);
         self.beatmap.compute_stacking();
 
@@ -214,8 +215,8 @@ impl Game {
             let ho_time = (ho.inner.start_time.0 as f64) / 1000.0;
             let stacking = ho.stacking as f32 * STACK_DISTANCE as f32;
             let pos = [
-                PLAYFIELD_BOUNDS.x + osupx_scale_x * (ho.inner.pos.0 as f32 - stacking),
-                PLAYFIELD_BOUNDS.y + osupx_scale_y * (ho.inner.pos.1 as f32 - stacking),
+                PLAYFIELD_BOUNDS.x + osupx_scale_x * (ho.inner.pos.x as f32 - stacking),
+                PLAYFIELD_BOUNDS.y + osupx_scale_y * (ho.inner.pos.y as f32 - stacking),
             ];
             let color = draw_info.color;
 
@@ -240,8 +241,8 @@ impl Game {
 
                 let end_pos = ho.inner.end_pos().unwrap();
                 let end_pos = [
-                    PLAYFIELD_BOUNDS.x + osupx_scale_x * end_pos.0 as f32,
-                    PLAYFIELD_BOUNDS.y + osupx_scale_y * end_pos.1 as f32,
+                    PLAYFIELD_BOUNDS.x + osupx_scale_x * end_pos.x as f32,
+                    PLAYFIELD_BOUNDS.y + osupx_scale_y * end_pos.y as f32,
                 ];
                 self.skin.hitcircle.draw(
                     ctx,
@@ -283,8 +284,8 @@ impl Game {
                     let travel_length = travel_percent * info.pixel_length;
                     let pos = spline.point_at_length(travel_length);
                     let ball_pos = [
-                        PLAYFIELD_BOUNDS.x + osupx_scale_x * pos.0 as f32,
-                        PLAYFIELD_BOUNDS.y + osupx_scale_y * pos.1 as f32,
+                        PLAYFIELD_BOUNDS.x + osupx_scale_x * pos.x as f32,
+                        PLAYFIELD_BOUNDS.y + osupx_scale_y * pos.y as f32,
                     ];
                     self.skin.sliderb.draw_frame(
                         ctx,
@@ -322,7 +323,7 @@ impl Game {
             let pos = song.position()?;
 
             if let Some(timing_point) = self.beatmap.inner.timing_points.first() {
-                if pos < timing_point.time.as_seconds() {
+                if pos < timing_point.time.as_seconds().0.into_inner() {
                     if let TimingPointKind::Uninherited(_) = &timing_point.kind {
                         self.current_uninherited_timing_point = Some(timing_point.clone());
                     }
@@ -332,7 +333,7 @@ impl Game {
             let mut found_uninherited = false;
             let mut found_inherited = false;
             for timing_point in self.beatmap.inner.timing_points.iter() {
-                if pos < timing_point.time.as_seconds() {
+                if pos < timing_point.time.as_seconds().0.into_inner() {
                     continue;
                 }
 
@@ -366,7 +367,7 @@ impl Game {
                 ..
             }) = &self.current_uninherited_timing_point
             {
-                let diff = pos - time.as_seconds();
+                let diff = pos - time.as_seconds().0.into_inner();
                 let tick = info.mpb / 1000.0 / info.meter as f64;
                 let beats = (diff / tick).round();
                 let frac = diff - beats * tick;
diff --git a/src/game/seeker.rs b/src/game/seeker.rs
index e0204d3..a3f1b53 100644
--- a/src/game/seeker.rs
+++ b/src/game/seeker.rs
@@ -33,7 +33,7 @@ impl Game {
                     TimingPointKind::Uninherited(_) => Color::new(0.8, 0.0, 0.0, 0.5),
                 };
 
-                let percent = timing_point.time.as_seconds() / len;
+                let percent = timing_point.time.as_seconds().0.into_inner() / len;
                 let x = BOUNDS.x + percent as f32 * BOUNDS.w;
 
                 let line = Mesh::new_line(
diff --git a/src/game/sliders.rs b/src/game/sliders.rs
index 7d029c3..a2f411c 100644
--- a/src/game/sliders.rs
+++ b/src/game/sliders.rs
@@ -47,9 +47,8 @@ impl Game {
             .spline_points
             .iter()
             .map(|point| {
-                let (x, y) = (point.0, point.1);
-                let x2 = rect.x as f64 + osupx_scale_x * x;
-                let y2 = rect.y as f64 + osupx_scale_y * y;
+                let x2 = rect.x as f64 + osupx_scale_x * point.x;
+                let y2 = rect.y as f64 + osupx_scale_y * point.y;
                 boundx = boundx.min(x2 - cs_osupx);
                 boundy = boundy.min(y2 - cs_osupx);
                 boundw = boundw.max(x2 + cs_osupx - boundx);
@@ -104,16 +103,15 @@ impl Game {
         control_points: &[Point<i32>],
         rect: Rect,
     ) -> Result<()> {
-        let osupx_scale_x = rect.w as f64 / 512.0;
-        let osupx_scale_y = rect.h as f64 / 384.0;
+        let osupx_scale_x = rect.w as f32 / 512.0;
+        let osupx_scale_y = rect.h as f32 / 384.0;
 
         let points_mapped = control_points
             .iter()
             .map(|point| {
-                let (x, y) = (point.0 as f64, point.1 as f64);
-                let x2 = rect.x as f64 + osupx_scale_x * x;
-                let y2 = rect.y as f64 + osupx_scale_y * y;
-                [x2 as f32, y2 as f32].into()
+                let x2 = rect.x as f32 + osupx_scale_x * point.x as f32;
+                let y2 = rect.y as f32 + osupx_scale_y * point.y as f32;
+                [x2, y2].into()
             })
             .collect::<Vec<Point2<_>>>();
 
diff --git a/src/game/timeline.rs b/src/game/timeline.rs
index 1938f00..0d9d119 100644
--- a/src/game/timeline.rs
+++ b/src/game/timeline.rs
@@ -4,7 +4,10 @@ use ggez::{
     nalgebra::Point2,
     Context,
 };
-use libosu::{hitobject::HitObjectKind, timing::TimingPointKind};
+use libosu::{
+    hitobject::HitObjectKind,
+    timing::{Duration, TimestampSec, TimingPointKind},
+};
 
 use crate::hitobject::HitObjectExt;
 
@@ -56,13 +59,13 @@ impl Game {
                 &uninherited_timing_points[i],
                 uninherited_timing_points.get(i + 1),
             );
-            let fst_time = fst.time.as_seconds();
+            let fst_time = fst.time.as_seconds().0.into_inner();
             if let TimingPointKind::Uninherited(info) = &fst.kind {
                 last_uninherited = Some(info);
             }
 
             let snd_time = if let Some(snd) = snd {
-                let snd_time = snd.time.as_seconds();
+                let snd_time = snd.time.as_seconds().0.into_inner();
                 if snd_time >= timeline_left && snd_time <= timeline_right {
                     Some(snd_time)
                 } else {
@@ -85,7 +88,7 @@ impl Game {
                     let beat = last_uninherited.mpb / 1000.0;
                     let ticks = TICKS[last_uninherited.meter as usize];
 
-                    let mut time = fst.time.as_seconds();
+                    let mut time = fst.time.as_seconds().0.into_inner();
                     let passed_measures = ((timeline_left - time) / beat).floor();
                     time += passed_measures * beat;
 
@@ -158,7 +161,9 @@ impl Game {
             .beatmap
             .inner
             .get_hitobject_end_time(&ho.inner)
-            .as_seconds();
+            .as_seconds()
+            .0
+            .into_inner();
 
         let color = self.combo_colors[ho.color_idx];