The soundtrack is played live by the game. Two tracks unlock with each age. Auto follows the current age, Repeat plays a favourite, and Shuffle mixes everything unlocked.
| Track | Unlocks in | Lead instrument |
|---|---|---|
| Jar by the Window | Founding stage | Kalimba |
| Night Light | Founding stage | Celesta |
| Pebble Paths | Stone Age | Marimba |
| Dew on the Clover | Stone Age | Kalimba |
| Warm Hearth | Bronze Age | Felt |
| Copper Morning | Bronze Age | Marimba |
| Backyard Breeze | Iron Age | Marimba |
| Long Shadows | Iron Age | Felt |
| Kettle Song | Steam Age | Kalimba |
| Little Engines | Steam Age | Marimba |
| Chimney Lullaby | Industrial Age | Felt |
| Conveyor Waltz | Industrial Age | Marimba |
| Glow in the Dark | Atomic Age | Celesta |
| Half-Life Hush | Atomic Age | Felt |
| Dial-up Daydream | Information Age | Celesta |
| Pixel Rain | Information Age | Kalimba |
| Starfield | Space Age | Celesta |
| Orbit Lullaby | Space Age | Kalimba |
| Everything at Once | Singularity | Kalimba |
| Home Again | Singularity | Felt |