NES: Stack-UpHere's a high tech, high strategy juggling act that's loads of fun! Are you up to the challenge? You've got to get R. O. B., the World's first Robotic Operating Buddy, to stack a pile of colored discs to match the colored pattern on the screen. This exciting Robot game can be played several ways. In the Direct mode, you have to match the pattern in the shortest number of moves. In the Memory mode, you can program up to 100 Robot moves as you try to