Things I liked, I felt you had an awesome concept for rewind and I liked how in the last level you showed a way to even interrupt your past self. Taking a mechanic and then building variations is exactly what needs to be done to make puzzle platformers like this interesting in the long run. It was also intuitive as in a lot of the puzzles if the player was observant enough from the start they can solve them in one go which is very appreciated.
Things I didn't like, honestly felt a bit short to me. You introduced a new mechanic in the last level but didn't build upon it after which was unfortunate. In addition I feel like it was lacking something else in gameplay to add some depth to it. That can easily just be chalked up to a time constraint though so no biggie.
Overall I really enjoyed your game and I hope your proud of where it's ended up after this week!
- Von Harley