your doing what you can and what you can do is already insane. I have played a lot of promising games (in my opinion they were at least) and most of them either finish at a much sooner point that you did, or abandoned the game because they couldn't do it anymore, didn't want to do it anymore or left and basically scammed people on patreon/itch or whatever they do, and making certain no one knows what the hell happened to them. sometimes they even just delete the game without saying anything and no one even notices.
also another thing, your writing the ENTIRE game in English and if I remember correctly you said English isn't your first language, meaning your adding all this stuff and writing better than people who have spoke English since childhood! that's kinda fucking crazy.
also why would focusing on what you want to update instead of specific things you "would need to do" be inefficient? if you didn't want to do it you might end up procrastinating or burning out REALLY fast. just do what you can. I was gonna add some motivational quote here but I forgot it mid typing so I'm just gonna repeat your doing great lol.