I got about 4 floors in and then stopped. Not having control over your direction was interesting at first, but pretty soon in, I realized the enemies weren't much of a threat (you can mostly just spam arrows if they're in your way, and there seemed to be plenty of health pick-ups anyway.) Then the game just boiled down to: run into walls to turn around, stop before and shoot yourself if you only need to turn 90 degrees.
Might be cool with some more to it!