Kirby: Tilt 'n' Tumble is a video game developed by HAL Laboratory and published by Nintendo for the Game Boy Color console in 2000. The game is known for its innovative gameplay based on motion detection, which uses an internal accelerometer in the game cartridge to detect the player's movements.

In the game, the player controls Kirby, Nintendo's iconic pink ball, who must roll and jump through a series of levels with the goal of reaching the end and defeating the final boss. To control Kirby, the player tilts the Game Boy Color console in different directions to make Kirby roll on the screen.

In addition to rolling and jumping, Kirby can also inhale objects and enemies and use them as projectiles to defeat other enemies or to reach inaccessible areas. Throughout the game, different obstacles and enemies are presented that require a variety of skills to overcome.

The game was well received by critics and fans for its innovative gameplay, variety of levels and challenges, and Kirby's adorable personality. It has also been highlighted as one of the first games to use motion detection on a portable gaming device.