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...and apparently all the suspension parameters stripped out for some bizarre reason.

The physics simulation clearly uses inelastic collisions, which is wildly unrealistic and why so many otherwise passable 'cars' don't pass the course. Also seems to use a very low coefficient of friction - most of my cars couldn't make it up a two-segement slope.

... Apparently boxcar2d works perfectly in Ruffle, which the Internet Archive automatically loads :)

https://web.archive.org/web/20240428203838/http://boxcar2d.c...

I knew I had seen something like this over a decade ago!

This html5 version has also been around for longer than a decade already. It's what inspired me to take a class on Genetic Algorithms and Evolutionary Computing in university back then.