When the machine is fully loaded you will see 6 squares with various games on each. To open up the menu press the player 1 start button. You will now be able to select any game by using the joystick. There are 10 pages of games for this machine to look through.
To preview a game (see what it looks like), press the A button (nearest the joystick). Press A again to exit the preview.
To play the game press the player 1 start button and the game will begin.