This is well put together as an audio exploration experience! I loved your explanation on the wall; I need something similar for my entry.
The keyboard on the floor to control the looping audio was a nice touch! Have you ever played The Talos Principle? In it, you control your character as a recording, then hit replay so you can control yourself and a ghost of yourself moves around as recorded. It would be cool to have some player-defined audio loops based on a second character moving as recorded by player control.