I like the idea of a 3D Pac-Man. It's hard to tell where the people are as you're moving through the map, though. It feels more like they're sneaky up on you then you are sneaking around them. I think the game would benefit from giving the enemies larger flashlight cones. That way, the player could see them from around corners more easily.
If a lot of enemies are tracking you at once, the meter in the top-right fills up very quickly. This can feel unfair sometimes.
The camera often gets obscured by the wall around the perimeter of the map. That can get pretty awkward at times.