I like how you made the different players co operate with themselves as your thematic interpretation of the theme.It was really fun.
However I got stuck for a while in the beginning because I didn't know how to switch players. Amd when I got stuck in the pit with only one character left in the second level there was no game over screen so I just had to restart the level. Other than that tho it was a very good game. Keep it up! :)