When the Green Flag clicked, Press 1 to play as Pac-Man, or 2 to play as Ms. Pac-Man. When the game actually starts, Don't eat a Power Pellet yet if another player wants to play. The 2nd player will press either 2 if you are Pac-Man, or 1 if you are Ms. Pac-Man. Pac-Man uses the arrow keys. Ms. Pac-Man uses the WASD keys.
All games made by Namco Inc. I do not own any of this.