Thank you for your feedback. I still have to think about how to expand on the idea. Trine looks really interesting and definitely gives me a bunch of ideas that would make sense for this game as well. A good inspiration. I actually thought of making the characters switchable mid-play, but then there wouldn't be any rewind, so for the jam it didn't make sense.
I'm working on an update that fixes all the major bugs and planned missing features and adds things like a proper tutorial. Hope you can check it out again, when that releases. (Currently I joined another jam, so it might take another week before that comes out haha)