LAGS have you heard of impostor syndrome? I think you have it. Your games are not just a little above average or even good. They are absolutely amazing, and among the top sellers of itch.io. Same with your code. I could see you were not a programmer when you started, but the code you write now would be considered close to production quality for a game studio. Most people can't even grasp a basic loop, while you've learned to use coroutines and state machines by yourself. This is once again, not just above average talent. This is something that VERY FEW people in the world are able to do, and an extremely demanded skill that companies would pay 100 000$ / year in the US for, so I hope you're making it at least that. And I'm talking about the code, which is the field I know (I am a senior developer) but you're doing ART as well.
The reason why I mention impostor syndrome is because if you truly have it, the only way you can get rid of it is by knowing it exists. People will tell you positive things above your games because they are true, but you can't believe it. You will only focus on the negative feedback, which is NOT true. The problem is, some malicious people are exploiting it. You do NOT own anybody updates for HTA, even if the game "is not completed", this is a cheap excuse manipulative people have found to exploit you. No reasonable person who played your game has ever thought "Oh, I paid 2$ for this and it's not completed, booh what a bad dev". Every SINGLE of us thought: "Wait? I payed only 2$ for this game and it's that good? and we get another free update?? Wait, there are even secrets to discover?? And another update again? And it's free again? and he still doesn't consider the game complete??". It's been 4 years since release. You need a break then take it. If you need money, open a Patreon, I'll sub for 100$/month. A few annoying pricks will complain, but that's GOOD. You do NOT WANT these people in your community. They are NOT customers, they are manipulators. You do NOT want to even TALK with them, your time is more precious than the 2$ they have paid.