Great concept, execution needs work. People have talked about the controls configuration and I agree that needs to change but what I find more difficult to work with are the invisible barriers or whatever makes the characters seemingly stuck in the air after a jump. Level 3 has this going on as well ( https://i.imgur.com/zx8VDjj.png ) so you can't complete it. The characters move slightly from side to side but not much else, they're stuck there.
I really like the idea though. I think it could be a lot of fun if you could work out those issues.