I think this a really cool idea, I haven't seen any other game do a similar take to this in the jam. I liked when it had the level mirrored on both the top and bottom of the screen, I felt like that was a really cool effect.
If you wanted to improve, I suggest making the top and bottom levels differ in some way to force the player to have to guide two separate characters through. Forcing the player to make jumps or wait for a platform on only one side could result in some very interesting gameplay.