[racket] Codify

It wasn't clear to me from the video how someone programs the behavior 
of the games.  I wonder whether that is currently slick visual 
programming, or it's pretty much traditional programming (albeit with 
text editor features like a pop-up color chooser).

The Self morphs world, for example, didn't achieve the holy grail of 
visual programming, but it did give better demo for specifying behavior.

-- 
http://www.neilvandyke.org/