Nice game, I like the music and how cute the characters are. The jump sometimes doesn't register (I think it is due to the little gap between clouds), I think having gaps between cloud didn't really make sense. Also it could be hard to control both characters (especially for non-qwerty users but that's another srory :D).
Cool ideas though and you managed to implement quite a lot of interesting mechanics even though the powerups aren't always necessary (the block breaker and the scissor level can be easily done without them).
Great job!