So I played this game when I was much younger so I don’t remember too much. It was a pacman game I believe, though I couldn’t find it looking through the different games. It was 3D, I think, a PC game. The desktop icon was a ghost, I think. I remember near the end of the game (again, I think) there was a kind of boss battle and there was a corridor with the boss at the end. As you came toward him he was shooting at you so you had to duck into niches in the wall to avoid the shots. I also remember a level that was set in a sort of street setting, maybe on a residential block.
So sorry for the vague description but finding this game again would be really great.