Balls Bouncing with Sound (github)

The balls now only bounce back and forth in 2 dimensions.
They make sounds on collision with walls or floor (higher pitch the higher they go) There's some gravity in the y dimension plus drag to bring the balls to a stop.
Click to launch the balls toward the mouse.
Number of balls: 'q' to increase, 'a' to decrease.
Seriously... all the effort went into optimizing for more balls.
Press 't' to toggle the secret 3rd dimension.