About Unity. I don't create the game from scratch. UnityStore has libraries which provides all needed functionality similar to Renpy. I used NaniNovel. As far as I know, Renpy is having troubles creating something that isn't exctly a visual novel. Like adding mini-games, some 3d scenes. Unity just more powerful.
About AI art. It was produced by Stable diffusion. There are actually a lot of art styles you can choose but I just like the one I use. And AI art is not something I would prefer to use. Mostly I thought it like a temporary solution to demonstrate an idea, get some funds and find an artist. There are a lot troubles in the way from AI art to animated scenes and hates from peoples who thing AI steal arts. But personally it still looks better than most of middle artist.
Yeah, my English probably suck, I'm not a native speaker.
If I can raise funds on patreon I'll try to find someone who'll fix text issues.
On the one hand you have a generalist engine like unity.
On the other hand you have a specialized engine like RenPy.
Couple that with the fact Unity "committed suicide by CEO" a few weeks ago and there are
MANY people pissed about the engine now, despite them taking
SOME of the proposed changes back, this decision ... baffles me to say the least.
It is not like you can gather work experience either since many "big developers" are jumping ship.
As said the minigames are bad.
The reaction game has no indication whatsoever.
Well I guess you "hit it" when the cursor got faster but that's it.
No sound clue, no pause with the red target bar turning green, no nothing.
That RenPy has problems with minigames is correct.
But these problems are relatively minor as many developers of (A)VN's could tell you.
Just take a look around for big AVN games here.
BaDIK for instance has quite a few minigames that work really well. It is a RenPy game.
There are no tutorial popups whatsoever as well.
Mentioning that the player at sex is able to touch the girl in certain places (albeit that being kind of obvious being an AVN) or that the player has started a minigame where s/he is supposed to hit spacebar as soon as the cursor is brought over the target area. And no mention of how often that shall be done either.
For the language fixes using patreon it is something of a catch22 situation.
With language that needs much fixing you are not really able to attract many patreons but without a certain number of patreons you can't hire someone fixing the language.
Don't get me wrong, I'm not trying to discourage you or something like that.
On the contrary I point out the sections on which the game needs improvements.
The story idea is part refreshing and part "old news" (isekai hit (obviously) by truck kun).
I'm keeping a watchful eye on this game and hope it does improve.
/edit
Just took a look at your patreon.
The main reason you have so few patrons is that the "1€ support group!" is costing 3€. That does not sound like much difference but some new patrons are scared away by this.
That and your patreon is poorly filled for the asking prices.
There isn't even a clear indication of what the rewards for each tier might be.