No not at all, it’s really simple and high rewarding (in terms of usage)

It was only doing problems when running things like Doom or videos, so I guess my rendering system isn’t optimized enough.

Yes it is playable, I made an API for window graphics which gives every window the ability to render stuff on it’s surface. Then I used DoomGeneric to port my graphics API to Doom.

Thank you and good luck!

You can read about how NASA writes their code, I remember reading an article about it, which includes some great tips with how to avoid these kind of bugs. And I think also as other commenter said, new languages like Rust really help with avoiding bugs like that.