Thanks for submitting a game. I think that I may be missing something, is the rewind function supposed to move the player back to the beginning? I can't seem to get past level 3 where the rewind begins to be needed.
Not why that would be happening the rewind should just change the direction of the platform while you hold space. maybe you're falling down the pit, the collisions are a bit off in places or it's just some weird bug.