My heatmap code was very slow in the Flash Virtual Machine on my ancient PowerPC Mac, so I optimized the hell out of it and now it is actually useful. Here is a demo. Green dots chase red dots, red dots chase yellow dots, and yellow dots chase green dots. The blue clouds you see are the heatmap representing proximity to the nearest green dot. (the red and yellow dots have their own heatmaps too, but you can’t see them)
The “advancing wall of doom” isn’t obvious yet, but hopefully it’ll make sense later.