I was really intrigued by the post-apocalyptic world the dev is trying to build in this game. I think this game did a pretty good job painting that background through dev's style of writing, as well as the incorporation of darker elements that fit the morale of that world in plotlines and player choices.

The stat system is also pretty neat. Protag's stat raises can be felt in battles, but they also won't make earlier enemies suddenly too easy to kill. There also weren't any OP enemies or items that break the gaming experience, so overall the balancing is very well done.

The major drawbacks of this game are: 1. the lack of detail / depth in character building and 2. the uneven distribution of content.
No character "react" to the protag in any sort of way as you progress: it's the same repetitive dialog no matter what protag is doing. The only variation comes from the nsfw scenes, but even those are very simplified.
As for the second point, a large amount of content focuses only on the protag being a sub / bottom, making the experience sometimes unpleasant if you want to play as a dom / top. For certain characters, the game requires the protag to go thru a sub/bottom scene first if you want to progress w/ their romance.
Same thing for certain stat boost options. You are required to go through a sub/bottom scene to get a stat boost, even if you choose to play as dom/top.