Very nice game , great usage of theme, in my opinion the learning curve is a bit steep, maybe start with a easier level, and some of the colliders are buggy :) I feel through, the good thing is this didn't broke the game you could play with the two characters :)
Fun concept, but weird controls... basically the same remarks as the other comments, but great job anyway! I died so many times and I just replayed so the game is really fun!