I like when the theme of the jam is made into the mechanics so good work with that. Also very cute art and good music. Good job on saving the level rankings even after I left the game!
I would have liked if the levels added something different to the game or a new mechanic, also I think the powerup mechanic is kind of optional since the game can be finished with no problem without using it at all, maybe it helps with increasing the ranking but that also seems very optional.