That is an excellent result. Back in the 90's I converted a Radio Shack Wild Cougar (R/C truck) to autonomous control with a 68HC11 and had to slow it down under a walking pace just to keep it from crashing (it nominally went 20mph when you just controlled it manually). To consider the difference in compute over those 20 years is really quite stunning.

I particularly liked the lack of back propagation in the design (keeps things fast) but was really curious how they determine "optimal" (center of track). So that makes me wonder if the algorithm would learn a "line" through the track that optimized speed at reduced energy.

Next up, multiple cars on the track!