Very interesting. It reminded me a lot of Portal, I assume that's what you were going for?
You are absolutely right, it is super short: definitely could have used a few more levels. Also, I didn't understand at first that you needed to face the object you want to rewind in order to do it... or at least it seems so! Some information about this in the tutorial would be nice. But it was nice that the object being rewinded glew yellow. Also, the physics were a bit weird! I clipped through the platform in the main level a lot more times than I would like, and I had to repeat the puzzle a lot of times because I could never climb on top of the small platform without falling.
Overall, though, it's a nice idea that could be explored further!