Great music and atmosphere! I wasn't able to get past the "Hold X" part. I tried holding X as well as the jump, but nothing happened. The custom gravity stuff was really neat though. Let me know if I missed something obvious and I'll try again.
You have to stay still as well, this is tragically because of a bug that I couldn't figure out to fix where every time you move horizontally it briefly registers you as not being on the floor.
