Monochrome Confusion

If there were any games that would not be suitable for monochrome handhelds such as the Game Boy and the WonderSwan, it had to be the Puyo Puyo series. Shape recognition can be challenging for some gamers, especially in Puyo Puyo—a game that combine Tetris and Connect Four, where the Puyo disappear when four or more of the same color connect. Therefore, the monochrome versions of Puyo Puyo games had an unexpected increase in difficulty as a result of Puyo Puyo being a game where the Puyo only vanish if four or more of the same color connect to each other.