http://www.planetgamecube.com/news.cfm?action=item&id=6068
Official Site
http://electroplankton.com/
The game, which will be released April 7 for a price of 4,800 Yen ($45), is a hardly a game at all. Electroplankton is more accurately described as a digital jukebox. Created by Japanese multimedia artist Toshio Iwai, the "game" shows soothing graphics on the Nintendo DS' dual screens, and plays music to accompany the visual display. There are ten different "digital planktons" in the game that react to the player touching the screen and speaking into the microphone. These plankton will respond to players with their own movements and noises. Electroplankton will also record noises picked up by the microphone and mix them back into the music. Also, an "audience mode" has the game create it's own original music
Official Site
http://electroplankton.com/