 Select game 2 or 3 and enter the maze in the Black Castle. Move screen to  the left of the first maze screen. At the bottom center of this room is a  closed cubicle. Use the bridge to enter that area and collect the "dot".  Carry this item to the screen just above the catacombs, located one screen  down and to the right of the Gold Castle. Note: The "dot" is the same color  as the ground outside, so care must be taken not to lose it in transit.  Drop the "dot" here, and bring two other items onto the same screen. Move  through the line on the right side of the screen to view the programmer  credits.