Very cool game I really enjoyed the levels.
I also really liked that you included story in your game, few games have it.
Music was awesome, I loved it.
I have played a few games in the jam with similar mechanics where you control both characters at the same time with the same controls. The only difference I have seen in their games is that they did not reverse the movement for one of the characters which made it less confusing to control. But from what I can tell this seems to be part of your level design so it just takes a little bit longer to get used to.
Overall great game design.