This is a pretty neat little game, but I have some criticisms.
That shadow guy that chases you in the white space floor is a neat concept, but I feel like the punishment for getting caught (or falling into the pit) is very harsh for how fast they move and for how long you have to avoid them for. Not only that, but the distortion effect that happens when they're near makes it incredibly hard to judge how close they are to you.
Also one extra criticism is that the mouse sensitivity slider doesn't offer much room for customisation. It felt rather slow even at 100.