The controls are a bit floaty, and I couldn’t figure out how to end the game. When I got to the fire it just kicked me back to the start of the level after showing like an image of a space bar key or something. I tried it with and without picking up the power-ups.
The concept of having one character be responsible for moving and the other for jumping, chaining them together and only enabling their respective abilities when they are touching (or almost touching) the ground is interesting, but the execution here could use some polish.