This was a nice polished game. This game has some potential and it motivates me to finish my unfinished jam game for this jam. I liked the idea that the movement/velocity rewinds instead of the actual position.
The only thing is the transition from being idle to walking, and waiting for the movement to accelerate feels slow.. Probably could make the transition a bit faster.
Oh and also while I did enjoy it some of the levels I actually managed to wing it on pure luck so you may want to change the difficulty a bit.
Other than that it was nice.