Cheat mode: Press Fire at the high score screen to display
the game's credits. Press [F3] to display the cheat menu.
Press [Cursor Right] to change the options. Press [Return]
to start the game with the selected cheats.
Information in this section was contributed by levior.
Unlimited lives: Load or reset the game, then execute the following
BASIC commands before running or restarting the program.
Information in this section was contributed by poschild.
