I thought the aesthetics of the game were great. The player controls are a little floaty, but I guess that's a part of the design. It felt a little slow for me because retrying takes very long.
I would have like to be able to see the layout of the other world. Otherwise it's very based on trial and error. Some of the moves are really precise, and hard to execute.
The game crashed with white screen after the third level.
Great work.