There is a bug in this game. The player hits the first letter of the color to choose the corresponding color: (B)lue (R)ed (M)agenta (G)reen (Y)ellow (W)hite for each of the four positions on each turn. There is no need to hit ENTER after each letter. Due to a bug in the program, the same color can't be entered twice in a row. To get around this, hit some other key between repeated colors. For instance, to enter Red, Red, White, Blue type R (space) R W B