Couple of usability notes: It isn't too clear where the power pills are in the 3d environment without shadows. Mario always drops a shadow below objects so you can place them in 3d. Also, the walls seem a bit strange, like small buildings instead of pac man barriers. It's difficult to see which ones block the character for real. Also, a sizable chunk of the level is just an empty space with no pills or ghosts. Also, the ghosts can go through walls, which really takes a lot of fun away. Finally, the music seems to have a game over sound effect when it loops.