Sega Game Gear. Originally entitled Fantasy Zone Gear: Opa Opa Jr. no B?ken, this game plays very similarly to the arcade and console game of the same name. However, its background story is different, and technically, it is a sequel to the first game.
Columns is loosely derived from Tetris, as it involves arranging falling blocks in such a way as to clear them. Sequences of 4 or 5 count for double or triple points, and diagonal sequences score the most.