Nice small touches like voice acting, "Not alive anymore", funny font and the fact that you fall down in a manner that makes you feel that you are REALLY high up.
A bit of annoyance when a player faces the wall and walks into it sometimes player flips his orientation backwards and forwards like crazy.
Also, continuing little touches theme, if you make jumping in this sort of games (which is usually the main action of the game), consider making jumping action feel REAL good and cool. This one is a lacklaster a bit.
E two times when opening a chest and grapping an item feels excessive. One is more fitting.
Ctrl to attack with E to interact is an ergonomics nightmare.