That's really incredible ! Still, for a total beginner like I am, 589 lines of C++ don't seem enough to cover it all, so what's the fuss? Where are the assets?

That's really incredible ! Still, for a total beginner like I am, 589 lines of C++ don't seem enough to cover it all, so what's the fuss? Where are the assets? What should I look for? Agreed, feel free to post on show HN to level up the debate