Late to the party, but finally finished it. I think I started about a year ago, which presumably says something about that experience - but first things first; congratz to a dev actually finishing a quite large game; probably heard that praise a few times by now, but it just must be respected among the pile of unfinished and abandoned and ongoing projects
As for my take on the game; I quite liked it, but also it kinda ran out of steam for me. I definitely would not have wanted for it to go on even longer. I most enjoyed the early parts, when things where developing, when the story felt quite threatening but was also slowly including the various erotic elements ...
... later, when it was more harem-y and the threat wasn't so "zombie-based" anymore (and our dude got a bit too survival-chad-dude to me) I lost some interest.
People will disagree, but cutting 95% of all the flashbacks would improve the pacing and thus the game immensely. They are typical first draft elements that would be red penned in a second or at the latest third editing of a story. They don't add enough and interrupt far too much.
Porn-wise ... you kinda can't unsee the HS2-animation loops and such after a bit, but at least in the beginning the writing/scenario made up for some of that. Though, again, towards the end I didn't really need even more.
Overall good stuff and certainly a game I generally would say people should try on here (for one, because you can actually finish playing it) but, yeah, obviously, if I'd completely loved every second of it I'd have played through it in a week and not a year, duh