This a great start and I really like the idea but there were a few problems I found. The colliders on the movable boxed are wierd and can sometimes be pushe through walls. The movement is very slippery and should feel more snappy in my opinion. And the jump felt unresponsive at time (wouldn't jump near the corners of platforms). Also I would realy like only 1 key to toggle which player im using insead of 2. Overall though, I enjoyed the game and with a couple of changes I think it could be really great!