One thing I would like to see is support for modding. It's technically possible to make mods right now, obviously, but it'd be a real pain to do anything substantial given that it's all in one file. I'm guessing you probably have an organized set of files that you develop on, and then combine it later into the release version, so I'm not entirely sure if it'd be possible to add support for external files or if those mods would also have to be compiled with the main file. Maybe providing access to the pre-compiled version, and explaining how to potentially compile it together with mods? In addition, knowing what program(s) you use for the pictures, as well as access to character models and scenery would be great too.
Obviously, it's your game, and you're definitely not obligated to do any of this, but I don't think it'd do any harm. Usually porn games tend to do very well when modding is possible (look at free cities and CoC for example, which despite being abandoned for years, still have active modders). One additional benefit is also that modders can do stuff that you're not allowed to on patreon lol