Hold down 'ENTER' (not return) and 'P', then press 'O'.  Now use the
        following keys:

                    'F'_______________________________Refuel.
                    'O'___________________Activate demo mode.
                    'L'___________________________More lives.
                    'N'______________________Resume the game.
                    'C'______________Special effect on & off.
                    'D'__________________________Demo on/off.