So, having now played through all of Ero-Gen... I hate to say it, but it's not very good. The issue is that gameplay is too shallow for each style. That's going to happen when you have like five different games under one hood, none of them get the dev time they deserve. The platforming feels clunky, particularly in the indoor sections; maybe it was my install, but during the management sim parts the bandits flickered pretty hard, to the point that some were invisible, and making things to sell them is boring. Management goes on entirely too long in the last one; the first and second were decent lengths, but I'd slice off a quarter or so of the final payment. Then we get to the story.
It feels random, and a good amount of it- particularly before the first platforming section- is entirely too long and repetitive. I don't want to knock the parts where you try stuff that isn't entirely to put damsels in distress, those were interesting and I'd have liked more worldbuilding, particularly because you can really feel the game was written in one pass and the story not gone back and edited to account for new ideas. And if you skip the story, you're completely out of context.
As for what I liked... well, I enjoyed the gameplay in the fights and the dancing. The animations were decent to good, though the cum is too much like sludge for my taste. And the character design was good too. I've been following Ero-Gen since the first complete fight beta, and I wouldn't have if I didn't enjoy that part. It was, however, a little disappointing that it wasn't expanded upon since then; the fights work the same now as they did then. That's one that I want more of.
Overall, it's not bad (aside from how depressing the story and world are until the cliffhanger ending) but it's not really good either. It's honestly kind of forgettable in its full form, and that's a damn shame.