This was one of my favorite submissions! I loved the atmosphere, the minimalist visual style and the creative puzzles. I enjoyed the toenail level the most. I don't have many major criticisms, but here goes:
The audio levels were really, really low.
The red clapping hands had me stumped for a while. It took a long while to notice they were moving backwards, probably because their movement was so slow. I thought I had to do some weird trick jump to get to the hole.
I was expecting to be able to do something with the balls in the end, like maybe knocking the letters off. Didn't find anything else to do but to throw them into the void, or jumping there myself.
Finally, I'm not sure if it was an intended joke or not, but the ability to drop mouse sensitivity to 0 made me chuckle. I was able to drag it back up with WASD. The lowest sensitivity above 0 was a bit too high though.