Hey, author of this here. Cool that it showed up! This was actually was my first shot at using CoffeeScript, so if anyone wants to check out the github and throw some pointers out for better CoffeeScript style code, that'd be awesome!
Apparently this is a resource hog and runs pretty slow in Firefox and IE9 at the moment. I'll see what profiling shows up.
I hope to implement some other generation algorithms so people can compare them side-by-side. Suggestions welcome!
I really love visualized algorithms like this. To less-than-brilliant people like me, it's often the only intuitive way to understand how an algorithm works.