My biggest problem is just how non-lewd this game is.
This has the ONEONE1-problem, of having the mechanics and story where the porn is pretty much tacked on as a disconnected add-on, rather than it being the driving force of the game.
...which means that it's 90% a regular single-character RPGM-game. Which is something I've played quite a lot of, and the author isn't doing anything too new or crazy with. They say form dictates function, and the RPGM-tools in this case have kind of taken over the game.
The implementation of the sex-scenes is predominantly pretty bad. They're stuck both mid-combat and post-defeat, which are both a bit problematic even without accounting for shoddy mistakes like having the stock battle-theme blasting over the whole thing.
The art has big boobs, though, which is pretty great, and there's preg-content, even though you kind of have to force those scenarios, since the game mostly lacks decent mechanics that would tie into the sexual themes.
Overall, it plays like a very wordy doujin. I wonder if the author would like to try something in a different genre?