This has been my favorite submission so far! The game feels coherent and complete, the art direct and little guys are so cute, and the puzzle concept is well executed and just tricky enough to understand at first, but still have to think about. As others have said, the 'Z' for jump is awkward. I would make jump space or 'W' and the perspective swap 'Z' instead. Some nice music, maybe that distorts on character swap, would add to the atmosphere. Fantastic job here! P.S The parallax is a nice touch.