Excellent! Eventually the balls go through the lines, but it's unclear what the rules are? A couple of months ago I did a ShowHN for Billard, which also uses p

Excellent! Eventually the balls go through the lines, but it's unclear what the rules are? A couple of months ago I did a ShowHN for Billard, which also uses physics and collisions in 2D space to make music: https://billard.medusis.com/ https://billard.medusis.com/ Those are fun experiments.