I like the 3D take on the original Pac Man game. To take it to the next level, I would suggest slightly increasing the size of the sphere collider on the orbs and adding sound effects to give the player feedback that they successfully collected an orb. Having some player feedback as to the number of orbs remaining would also be helpful even if there was no sound effects. The addition of background music would also be a nice enhancement. I had a hard time getting the game to close without a quit button somewhere on the screen.