Interesting concept, but it's brutal to be able to die on the first screen of the first level of the game. Definitely needs a bit more ramp to the intro, especially when the first enemy you encounter can just bull doze you too and kill you. I was hoping they'd fall to his doom like I did if I pulled the floor out from under them.
I wonder if I'd do any better if I had three separate keys away from my movement keys that let me just pick the specific layer I wanted to have on.