Wii Music

Wii Music gameplay focuses on playing and arranging songs through improvisation using various instruments. Similar to how Wii Sports simulates playing sports by mimicking the required gestures using the motion sensitive Wii Remote, Wii Music simulates playing music by mimicking the actions associated with the different instruments. Like all games in the Wii series, the players control Mii characters created using the console's Mii Channel. (wikipedia.org)