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.
Oh I see I didn't realize that space bar was the rewind feature, I thought it was the arrow at the bottom, that works much better. Thanks!
Now I'm thinking about it, that button wasn't the best game design choice I could have made. Anyway thanks for playing.