Pocket Puyo Puyo Tsuu is the Game Boy version of the classic falling-block puzzle game, and it's way more addictive than it has any right to be. You're matching these little blob creatures—Puyos—in groups of four or more to clear them before they pile up too high. The Tsuu version adds some sneaky chain reaction mechanics that make combos way more satisfying when you pull them off.

It's got that perfect "just one more round" energy, especially in versus mode where you can mess with your opponent by dumping garbage blocks on them. The controls are simple (d-pad and two buttons), but setting up those big chain reactions takes some real planning. The colors pop surprisingly well for an old Game Boy game, too.

If you've ever lost hours to Tetris or Dr. Mario, this one will ruin your productivity just as effectively.