Seconding the menu of doom, it got me as well. Should have read the comments, but I didn't want to get spoiled.
The atmosphere works pretty well for me, the only section I found a bit uninteresting as it is was the funrunner ball minigame, because it builds up this tension that something is going to happen in the last of the three levels, but never really does anything special, except the level number/name glitch in the beginning.
The visual presentation is 10/10, those are some fine visual effects. Like the "invisible" platform, that's the kinda thing that makes you go "how cool" when you finally see it and figure it out (took me a couple minutes). And of course the glitches. I'd like to see where you're going to take this too, I thought the idea of a corrupted game system is cool.