A port of Mr. Driller for the Game Boy Color, Mr. Driller is an arcade puzzle game developed by Namco and first released in 1999. Players control a driller who descends through layers of colored blocks, clearing paths while managing a limited air supply. Blocks disappear when four or more of the same color are connected, creating strategic challenges as the screen scrolls upward. The game emphasizes quick decision-making and careful planning under time pressure. It became known for its simple mechanics, increasing difficulty, and bright visual style.