Very creative platform/puzzle game! Love the time rewind and gravity-base mechanic, create a lot of space for innovative approach.
The one thing that made me felt sightly negative when playing these last levels: They are too punishing. It is really not fun to have to both precisely control objects and dodging obstacle as well as your high speed clone. Challenging: yes, fun: hardly.
Overall, I still love your game and think it has a great potential!