That said, it's not 'hands down, one of the coolest 3D websites', at least that I've seen. It's all "technical", very little "design". For example, why is it 'isometric overhead'? There's no particular benefit in the view, and it's specifically harder to control than it would be with a 'chase'/'third-person' camera. It's not like this is an RTS or a city-builder-ish thing, where having an overhead layout works to your benefit. Rather, it's just easier to program a camera that never changes angles and input controls that never have to re-interpret camera position/rotation (lookat vector) to function correctly. And there's a kind of symmetry between a flat page and the "ground" that the truck drives on, so some parts of the web forms have been ported over to that.
Again, none of that is bad and especially none of it is wrong. It's very cool that it works and works so well (technical)! It's just that the design feels more "portfolio" than it does "best ux for interacting with the environment I've created and the paradigms I've invoked (vehicle control)".
https://acko.net/blog/zero-to-sixty-in-one-second/