I've been reading about Electroplankton since back when it hit the DS in Japan. People universally like the game and have found a lot of interesting ways of saying that. Adam, over at Gamers With Jobs, just wrote up his impressions and manages to capture the essence of the game in a well-put-together review. In one of the best one-line descriptions I've seen of the game, Adam likens the title to fingerpainting with sound.

If you have any curiosity about Electroplankton you owe it to yourself to read this review.

Electroplankton [Gamers With Jobs]