I don't know if anyone has already requested this, but why not add a Maze Editor? Players can create their own mazes and levels by adjusting the size, changing the colors, and basically drawing out the walls and Pac-Dots on a grid. They can also move the Ghost Hideout anywhere and place as many Power Pellets as they want!
Also, if you could, could you add three more ghosts such as Funky, Spunky and Tim?