I can't believe this is your first jam game. This is really good! Y'all did a great job implementing the art assets so that everything looks natural and cohesive. The rewind puzzles were fun, but not brain-taxing (which I like). I actually didn't have any issue with difficulty and found it to be comfortable all the way through, although the acceleration on the character was a tad much.
The only criticism I have is:
- A way to start the rewind early (maybe just press R again). There were a number of times I would collect or miss a coin and be forced to wait a couple of seconds.
- The invincible/past/rewind version of you appearing in front of you make positioning tight in a number of areas. I keep expecting it to appear in me, but I get that that is not an option because you can collide with your other self.
- There's no real penalty for death. You do restart, but you don't lose any coins. It does prevent the game from getting frustrating, but it also removes the tension from the platforming.
Anyhow, looks great! I had fun with this, so thanks!