Ms. Pac-Man [2600] Atari Cheats

Ms. Pac-Man [2600] Atari
Press up & down at the same time. Ms. Pac-Man will go left and get
stuck in a wall.
Let the game enter the demo mode, then play with Game Select. The
monsters will appear and disappear as they move around, depending on
the difficulty that's currently selected. Useless, but amusing.