wow, thats cool.
but a more user-friendly way would be to have a button on each side, and shooting that button would make that button's side the
new floor
Prey does a remarkably similar (although more advanced, the game was designed for it) thing, except it used real gravity fields to turn the player upside down
also, you know how if you try to teleport a player upside down, he will right himself rather quickly (but smoothly)?
you could rotate the
world instantly, and rotate the player (who turns back to upright), giving the illusion that the world is turning.