60 Games: 

Selecting a game: Pressing the 1p or 2p unlocks the menu and allows you to select a game with your joystick. Once you have found the game you wish to play, select it with either the 1p or 2p button depending on how many players will be playing. To exit a game you must kill all of your men.

412 Games:

Pausing/Exiting Games: Only available on the 412 games unit* to pause or exit the game, hold the first player button down for 3 seconds to bring up the pause menu. Here you can exit the game, and save and load save states. Saving a state will allow you to return to the moment you paused the game by picking the load function. You can only have one save state at a time.

Search Function:  Only available on the 412 games unit* Pressing the first player button in the main menu will take you to the recent and quick search screens. Here you can look for games you've recently played and search for specific games. You can search for games via game title, as well as by emulator, genre, and alphabetical order.