[oreally]

I think the differentiator is the amount of deep Math that goes into it.

A simple card game is on par with standard app development.

But if you're working at lower levels of a world simulation engine that require linear algebra, computer graphics knowledge? Camera and joint manipulation? Animation? Navmeshes? Physics? That's a notch harder than a REST app and microservices infrastructure. Some robotics, ML areas touch on this too.

The only tough topics at these adtechs that might match would be graph manipulation, or currently ML knowledge. I suspect leetcode isn't very applicable in everyday usage.