I understand my opinions get ignored a lot but please consider at least letting me know you read this one. Regarding your player-base.
As someone who obviously likes the game, but drifts in and out - personally I just think the game is incredibly over-tuned. We're always relying on some kind of luck to manipulate a fight's AI unless we spend an exorbitant time just grinding up our raw numbers, but if we do that, we'll miss every time gate there is in the game.
The biggest culprit IMO is that the damage formula is simple, which is good, but it means damage multiplies rapidly in battle, especially for enemies. A barrier I almost always have in the early game is Darry and Barry for example. When one of them does a stasis bomb > pierce for like 100 damage when I barely have over 110-120 HP it day 25~ it completely negates your stats. There are rewards for pre-20 and pre-30 festival, but it's pretty unrealistic outside of ng+, storymode, and star knightess to overcome poor balance. There isn't even a guarantee you can outspeed them in order to stasis bomb it and prevent it - we won't have thunderbolt if it's any kind of attempt at an efficient playthrough, because we'll get it for free post-festival. And when fights are often EXTREMELY tight, when they get tactical advantage and you miss your own critical hit, you might as well just reset the fight. Even just the demon in the northern mines - on turn three it uses avaritas, and if it uses its magic attack on paul john, they simple die at full health. 80 damage. They only have 50/48 at this point lol. And that's only on normal/hard, never mind nightmare.
Look at your post for 47 pre-release. You're still talking about all the punishments you like doling out. It doesn't matter if we're pure or lewd, you are sincerely committed to making the player's experience miserable just because Aura is supposed to be miserable.
The numbers you're getting are probably pretty good for a hentai indie rpgmaker game. Whatever label you want to put on it - but I wager people drift away before completion or never move to pay up for your effort because *they* don't feel respected by the design at times. I paid here a while ago, and I'm not sure I would have if I played the game in its current state. Compared to when I played the most and paid for the game, there's less money in the game (gourmet meats for eg) and the player is weaker now, because of stat adjustments you made to things like goblin teeth, where you moved a magic attack to an MP point.
I don't know what kind of pathing or decisions you take in the game, you've said you've done all of this stuff yourself without a cheat console, without ng+, but part of me doubts you reach any of your time barriers. Maybe you've hidden some items in random places I've never found that provide stupid amounts of power, I don't know. The game has gotten very big, and the bigger it has gotten the more difficult it has become to do everything the game asks of you (even optionally.)
I'm just a fat nerd playing your game, but now that you've got some endings going, I'd consider looking at a lot of the game balancing, especially for pure where we're poor AND weak. *Especially* with your new demo version that now needs to leave a positive impression on people to upgrade.