Really good game, with quite a lot of levels.
I had two small problems :
-Some background objects felt like they were part of the level, which created some confusion. Like in one level you have a vertical grey bar that seems to be blocking the access to a keycard, but it's only background.
-The walljumpy/wallsticky thing felt pretty bad. It wasn't useful in my whole playthrough, and its only function was to make me miss some double jumps. I don't really understand this mechanic.
Other than that, great work, lots of content, good idea.
Quite the nice game.