So I added a mechanic to my little physics based game.
http://kritz.net/personal/KXG164_Infection.swf
You click to spawn red or green balls (random), and as they gravitate to each other they infect enemy balls. You can click a red ball to change it to a green ball for testing purposes. Sometimes when an even number of balls collide, it gets stuck in a deadlock. I think I've fixed this issue but I haven't tested completely. It should just take a few seconds to resolve the deadlock, which looks pretty cool, really.
The ball cap is 100, and I've removed the framerate protection so it's possible to dip below 30FPS.
I'm sure there's a game in here somewhere.