Great concept, and nice use of audio! At first I've followed the beeping, but seeing your update then I tried following music. And this works well for the first part! Unfortunately once the music change, I tried to follow it as well, but didn't get anywhere.
It is still a good mechanic. What I like is the few ambiant noises we have, letting the player imagine the environment in which they navigate. It creates a deep atmosphere. The music being fantastic also helps a lot being immersed in this world.
It's an ambitious concept, and while perfectible it still has great moments to offer!