Nice and crunchy distortion, it's put to very good use throughout the soundtrack to illustrate the instability, it feels like reality is about to breaking at any moment. The idea of crossfading between the light and dark sections of the track was well executed, I flipped back and forth a couple times to get a feeling between them and I can imagine it being quite seamless in game. I especially enjoyed the dark section of Amidst, it really felt like a great climax for the game.
Don't think I have any complaints, it's an interesting game mechanic and a well executed soundtrack to compliment it, kudos.