Interesting game. I don't know if the audio was meant to be like this but if it was then it adds a unique sense of dread as you go through the world, which is quite fitting to this abstracted and incomprehensible world.
I do think the character sprites are not a good fit when taken in conjunction with the rest of how the game is presented - I don't know what the process for these were obviously and perhaps it was done for visual clarity but they just don't mash well enough. I think the enemies are an example of how to do this well - I clearly know one when I look at one, but they also look good within the game's world. It was also quite good structurally speaking, backtracking was intuitive enough to stop me from being completely lost but it was not too obvious to the point of feeling stale. Blocks being able to push you into directions was also a good touch.