So, sorry to be late to the party, but I'm missing some:
1) your jumps are annoying (I've tried jumping a bunch, but all I get is a bugged camera height for a bit)
2) Corrupted RGB corridor (I guess I haven't gotten lucky...)
3) Alley (directions, above Artsy)
4) Pick up the ??? (I think I have done that (In the corrupted room iirc) but nothing happened after that, no special room)
So if anyone can give any hints, that would be much appreciated. For 1 and 4 I'm starting to think they're bugged...