Yeah his current project seems to be Dynamicland [0] I love the idea of of the computer room they're building but I'm not sure the 'all code is printed on the tokens running them in the environment' works.
Kinda strange that he derided Mathematica at the end of the article. If I were asked to explore coming up with an algorithm to control the car, it's very obvious to me that Mathematica is a great choice, both for modeling the problem (a parametric curve for the road) and for visualization (although I'd do something much less fancy than he did, such as just using the basic ListLinePlot with some Manipulate). Seems like a fun exercise nonetheless.