I've seen a bunch of world rotating games in here, but none of them were actually full fledged platformers, they were more of a puzzle. This one stands out for sure. I like the moody cute sounds that that you actually made smooth world orientation transitions. There are few bugs here and there, for example the transition I mentioned before just jumps or gets stuck midways, but bugs are expected in a jam game. Different asset theme for different levels is definetly a bonus. Good job!