I have to agree with the other comments, great visuals and sounds :D
As for the gameplay, I like the looping mechanic and I think it works well in the beginning. However, at some point the way back becomes a bit tedious. I think a level layout with more shortcuts or generally shorter paths would help. It can also be a bit frustrating when you don't see far enough, especially the moving platforms leaving the window so you don't really know when to jump/dash.
I couldn't complete the game because the boss (I think?) killed me before I could react, and when teleporting there again, I got killed instantly, probably because I spawned on top of it.
Overall I really enjoyed the game though :)