The game won't have any music, or it will have a special one. Let me explain you.
The first key element is the health displayed in BPM (beats per minute), as a heart beat. This will create a continuous rhythm in the game.
The second element is the surfaces: walking on some surfaces will launch a sound (a complex-toned note) that will create an atmosphere.
The last element is perhaps the most linked with music. The shapes (leafs, rorschach clouds, etc.) will produce a short and atmospheric melody (not more than 5 notes). These shapes will be triggered only once.
So the game will always "produce" sounds, no need of music!