Time fcuk (it’s also worth nothing that the creator has said any spelling of the second word is acceptable as long as it uses fcuk.)
It’s part Portal, part…umm…other things? I don’t know how else to describe it. There’s sort of an AI face thingie that talks to you with bizarre, G.L.A.D.O.S-esque phrases and quips (like "Remember that time we had fun?..I don’t.)
Towards the later levels, you start to get a small growth that gradually gets larger, that the AI names “Steven.”
You can “switch” dimensions by hitting ‘a’, which makes the other colored landscape, which was previously ion the background, the “front” landscape that you know walk and jump on. Likewise, there are blocks, portals, etc… only in one dimension or the other, though the blocks you can “bring” with you when you change. It’s hard to describe accurately, you really need to play it.
I’m stuck on level…umm…ok, I don’t see level numbers, but the name is “Deep Cuts.”
Edit: nevermind, just got it!