During play, hold down 'A', 'G', 'E', 'S', and press the left mouse
        button for infinite everything.  Now use the following keys during
        play (doen't work on the amiga 1200).
                'F1-F5'____________Jump to corresponding level.
                '1-3'______Jump to the corresponding sub-level.
                '4'______________Jump to the end of level boss.
                'F6'________________________________Atari mode.