This is quite a fun experience! I've gone through the normal levels and the quit button, hopefully, I haven't missed anything. But from what I've played so far, it is very enjoyable! Especially the quit button part, where I feel like there is a strong resemblance to There is no game. The music and sounds are also very fitting to the tone, and I do like it a lot. Nice work!
There is this issue during the 4D section where the cursor is hidden by the game, and I need the Alt-Tab out of the game in order to proceed. That does take away the flow a bit and is not quite desirable. I also would hope the game to be a bit longer, but I guess with only one week, it's probably too much to ask.
Anway, keep up the good work!