Great entry with a gorgeous world. I like the concept, even though it's pretty straight following the theme. I think having the rewind on E instead of R could make the gameplay a little more smoothly, as it's easier to reach the E key, at least for me. The rotating platforms are soooooo slow, they are the main reason I quit the game a couple times because I didn't wanna have to go through them again, when dying at a later place. That's actually my main issue... but I read above that you already consider making a checkpoint system, so I won't get into more detail on that. And since I said 'quit a couple times' you can already tell that I still came back to the game to try it again. Looking forward to the post jam build!
It would be great if you could check out my entry too, it's by no means finished and also has a bunch of bugs, but is a side-scroller with larger world design as well. It's only my second game ever, so I would appreciate some feedback. Cheers