I like the main idea and the art style, but everything is too minimalistic, first I coudn't figure out how to press up to complete a level, and the most annoying was the bug when I stuck to the ground and can't move, and I have to play in order to progress.

I like this concept. I worked on a similar game myself :). I think this has a lot of potential as a puzzle game. Good work!

Good work, I would suggest for your next time with a project like this; that you maybe give some more direction as to what the main mechanic is, I got stuck at the half-way grey thingy near the end? of the level, I like the gravity swap thing for jumping; but I think it could be explored more. There's alot of potential, but as it stands, it could use some work.