"BallDroppings is an addicting and noisy play-toy. It can also be seen as an emergence game. ....Balls fall from the top of the screen and bounce off the lines you are drawing with the mouse. The balls make a percussive and melodic sound, whose pitch depends on how fast the ball is moving when it hits the line."
[via Boing Boing]
[via Choire Sicha of Gawker]