diff --git a/src/lib.rs b/src/lib.rs
index 19278b2..22f81e8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,6 +5,7 @@ mod wasm4;
 use wasm4::*;
 
 mod helpers;
+mod music;
 mod sprites;
 mod world;
 
diff --git a/src/music.rs b/src/music.rs
new file mode 100644
index 0000000..52b4d1d
--- /dev/null
+++ b/src/music.rs
@@ -0,0 +1,131 @@
+use crate::wasm4::*;
+
+const C4: u32 = 262;
+const D4: u32 = 293;
+const E4: u32 = 330;
+const F4: u32 = 349;
+const G4: u32 = 392;
+const A4: u32 = 440;
+const B4: u32 = 494;
+const C5: u32 = 523;
+const D5: u32 = 587;
+const E5: u32 = 659;
+const F5: u32 = 698;
+const G5: u32 = 784;
+const A5: u32 = 880;
+const B5: u32 = 988;
+const C6: u32 = 1047;
+
+pub struct Music {
+    started: bool,
+    frame: u32,
+}
+
+impl Music {
+    pub fn new() -> Self {
+        Self {
+            started: false,
+            frame: 0,
+        }
+    }
+
+    pub fn start(&mut self) {
+        self.started = true;
+    }
+
+    pub fn update(&mut self) {
+        if !self.started {
+            return;
+        }
+
+        // m1
+        if self.frame == 0 {
+            tone(G4, 10 << 8, 40, TONE_PULSE1);
+            tone(E4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 10 {
+            tone(E4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 20 {
+            tone(D4, 10 << 8, 40, TONE_PULSE1);
+            tone(G4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 30 {
+            tone(F4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 40 {
+            tone(E4, 10 << 8, 40, TONE_PULSE1);
+            tone(C4, 30 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 50 {
+            tone(C6, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 60 {
+            tone(B5, 10 << 8, 40, TONE_PULSE1);
+            tone(G4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 70 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 80 {
+            tone(D5, 10 << 8, 40, TONE_PULSE1);
+            tone(F5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 90 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 100 {
+            tone(A5, 10 << 8, 40, TONE_PULSE1);
+            tone(A4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 110 {
+            tone(A4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 120 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+            tone(A4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 130 {
+            tone(G4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 140 {
+            tone(G4, 20 << 8, 40, TONE_PULSE1);
+            tone(G5, 20 << 8, 40, TONE_TRIANGLE);
+        }
+        // m3
+        else if self.frame == 160 {
+            tone(A4, 10 << 8, 40, TONE_PULSE1);
+            tone(F5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 170 {
+            tone(G4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 180 {
+            tone(F4, 10 << 8, 40, TONE_PULSE1);
+            tone(G5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 190 {
+            tone(E4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 200 {
+            tone(G4, 10 << 8, 40, TONE_PULSE1);
+            tone(C5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 210 {
+            tone(F4, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 220 {
+            tone(E4, 10 << 8, 40, TONE_PULSE1);
+            tone(G5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 230 {
+            tone(D4, 10 << 8, 40, TONE_PULSE1);
+        }
+        // m4
+        else if self.frame == 240 {
+            tone(C4, 10 << 8, 40, TONE_PULSE1);
+            tone(B4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 250 {
+            tone(C5, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 260 {
+            tone(D5, 10 << 8, 40, TONE_PULSE1);
+            tone(G5, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 270 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+        } else if self.frame == 280 {
+            tone(C4, 10 << 8, 40, TONE_PULSE1);
+            tone(C4, 10 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 290 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+            tone(G4, 10 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 300 {
+            tone(C6, 10 << 8, 40, TONE_PULSE1);
+            tone(C4, 20 << 8, 40, TONE_TRIANGLE);
+        } else if self.frame == 310 {
+            tone(G5, 10 << 8, 40, TONE_PULSE1);
+        }
+        self.frame += 1;
+        if self.frame == 320 {
+            self.frame = 0;
+        }
+    }
+}
diff --git a/src/world.rs b/src/world.rs
index 49c105d..02babd0 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -1,4 +1,5 @@
 use crate::helpers::round_f32_to_i32;
+use crate::music::Music;
 use crate::sprites::*;
 use tinyrand::{Rand, StdRand};
 
@@ -26,6 +27,7 @@ pub struct World {
     rate_multiplier: f32,
     status_text: Option<(&'static str, u32)>,
     str_buf: [u8; 16],
+    music: Music,
 }
 
 impl World {
@@ -44,6 +46,7 @@ impl World {
             rate_multiplier: 1f32,
             status_text: None,
             str_buf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+            music: Music::new(),
         }
     }
 
@@ -132,6 +135,7 @@ impl World {
             self.score += 1;
             self.rate_multiplier += MULTIPLIER_INC_RATE;
             self.status_text = Some(("Speed up!", 80));
+            self.music.start();
         }
 
         if let Some((_, t)) = &mut self.status_text {
@@ -140,6 +144,8 @@ impl World {
                 self.status_text.take();
             }
         }
+
+        self.music.update();
     }
 
     pub fn draw(&mut self) {