Very nice game. I really like the art of both characters. They are quite unique! Support for controller and therefore couch co-op would very nicely fit that concept of the game.
But they are some points of improvement I would recommend:
- The jump is very hard to control. It speeds up a lot while in the air which makes platforming hard
- The music is nice, but loops very often and noticeable
- That I can't use the buttons with the mouse, while a mouse is required to play the game is confusing
- The characters sometimes are hidden (like trees) which makes it hard to understand where they are. I recommend some sort of dithering in front or stencil silhouettes
But overall very nice! I think you got yourself a very neat art style and idea to work with.