Thanks for posting the link in a comment below. It wasn't working in my browser but that link worked fine. I really enjoyed it! Appreciated your different level design and the tricky slopped ledge made me need to rewind time (such a sweet implimentation of the rewind). Decent effort, I liked having a win screen. If you wanted to take it further, maybe you could add an 'E' button to grab treasure from the chests and then maybe you loose coins if you fall?
For a game jam, by yourself and being only 12! I'm impressed.
Please rank our game if you have time. Thanks :)