Liked the idea. very fun to play.
For reasons i cant really explained I kept pressing tab to switch between players (out of habit I guess, it's like that in most games)... It was a bit frustrating... but my own fault.
Encountered a few minor bugs, mostly after splits where, the player would not move anymore or the colliders where not set to the right color.
The puzzles are nice and use the game mechanism pretty well.
Great job :)