dude it looks like a radical dm map
If you could walk upside down on the ceiling, and sideways on the walls, and then transition smoothly when walking from the floor to the wall to the ceiling, then this would be great.
Did that make sense? If gravity let you walk anywhere so you could travel all over it, then it would make a great DM as enemies can come from any direction.
I would definitely play a game with some M. C. Escher style maps and physics.