Hey man just some feedback regarding official support for your game: I wholly understand your desire to monetize your work and trying to do so by providing a little bit of paywalled content, and how it feels as if you are losing money by getting your codes leaked. To this I'd try to counter with the statement of: it really doesnt matter. It might sound mean but honestly those codes would not be reason enough for people to decide whether or not they subscribe to your patreon, there are many factors such as geographical location, economics etc... Someone that was going to download your stuff for free with no intention of ever supporting you, even if they had the means to do so, was never going to be a "paying costumer" in the first place, if that makes sense, so no money lost there.
If you want to really boost your numbers then you'd have to tackle whats probably your biggest constraint right now: your artstyle.
PLEASE DO NOT TAKE THIS AS AN ATTACK OR AN INSULT, I like your work as a whole, but it is also true that you can improve in that department. This criticism comes from good will and wanting to see you grow as a developer. Please do not be disheartened due to your slow follower growth. I've seen bigger games with way better artstyles crash and burn for some of the dumbest reasons *cough* Saria *cough*.
TLDR: just keep doing what you are doing man, a community of followers that is not only big, but also willing to support you isnt built overnight, best of luck!