this is fun, even though the speed controls aren't super intuitive. You can press "Surprise" to speed things up and go through a bunch of iterations quickly.

The mutation rate (likelihood that g changes) and mutation size (Δg) are fun hyperparameters to tweak while watching the population evolve over time.

It would be interesting to see a gene for "compliance" so the cars could have some kind of suspension. EVerything more or less evolved into a sort of tron-bike shape for most of the runs I tried.