Very cool visuals when swapping worlds and I like the potential of two players switching worlds to overcome different obstacles. I'm not sure how but I was able to win at the start without doing anything (maybe collision with object or something). The art is fun and simple. There was a few times I wasn't sure where to go or what to do so maybe an indicator for the goal. I like the concept but I think more needs to be added to the level. Good job. Please check out my game if you get the chance.