On the one hand, this kind of focus on mind-control and transformation is pretty rare.
On the other hand, this was clearly just a test-bed project where the guy was messing around with RPGM and experimenting. he turned into a prologue type thing or whatever, but it's clearly just an experiment he was working on to get better at RPGM stuff.
Beyond that, the H-scenes are, unfortunately, a bit lacking. There's barely anything to them aside from a bunch of koikatsu images and a handful of poor animations, which kind of misses the point of scenes in games in the first place. I don't mind the fact that the game shows other people's perspectives at various points like some kind of VN, so I won't mind it if this is how the next game will be too.
Still, hopefully the guy learns from this and makes sure to have a gallery in the full project, otherwise, things won't go that well. Oh, and I hope they'll improve the H-scenes to something actually interesting...