FLIP-8: Think-a-Dot edition

This is a version of Joseph Weisbecker's game Think-a-Dot (1965) aka. Flip (1974) implemented in Weisbecker's own CHIP-8 language for the COSMAC VIP computer (1977) he designed while at RCA. HOW TO PLAY Read the manual for Think-a-Dot here. Press 1, 2 or 3 to drop a marble into the respective hole. The marble will move through the flip-flops, moving either left or right at each one depending on it…