Right now, I am working on getting the most basic things/mechanism done in it. And sadly since I have university (oooooooooow lots of examsðŸ˜), and a main (programming) job, I barely get time to do what I really like (game programming hehe).. but I definitely work on it at my weekends and try to make progress in it, even if it's way too small! (small like a gopher ʕ◔ϖ◔ʔ)
I also do care about optimizations a lot! My last hobby project's source code ended up becoming 70GB 😠(damn Unreal Engine, I will never forgive them for making it so easy to gain weight), so this time I keep checking the game total size, cache size and all other stuff and focus on keeping it as clean as possible!(◕ᴗ◕✿)