Clever, but needs better AI
This is an ingenious inversion of the idea of Pacman. I like the music, and the graphics are excellent. Just one thing really let it down for me: the ghosts act as though they are lobotomised when not being controlled.
In normal Pacman, the biggest problem (for the player) is that the ghosts appear to be fiendishly smart; in fact, in many versions the ghosts have individual AIs. However, in this game the ghosts seem to select directions at random, and wouldn't give chase even if Pacman was directly in front of them; controlling them was frustrating, since they would often wander off as soon as you selected another ghost to control. (At one point, I even started to wonder if they were carefully programmed to avoid Pacman wherever possible!)
Make the AI just a little smarter, at least for the first few levels, and the game would be much more fun. Aside from that, I love the concept and everything else was spot on-enough that I would feel bad for giving you a score based on gameplay alone.