Why here is not tutorial about game dev ?

Answer 1

note that this is just speculation:

mainly because it would be difficult to compile on this app using common game dev engines such as unity or unreal engine. all the programming languages on here that aren't web can only do text on this app. normally they would be used for game dev. But since it's text on here, it's limiting.

Answer 2

Here you can find tutorials about coding and programming. And when you learn to code you can build whatever you want, game or spaceship.