This game is short and to the point. Most of the story elements are pretty easy to guess at and when the plot thickens it probably won't sneak up on you. Still, the mystery was enough to keep me interested in reading the dialogue to find out what's going on.
This is kind of a mystery game where you complete tasks and chores for each vault dweller to unlock sex scenes, and a few hints at the story. There are some RPG style battles, but it's bare bones since there are only a few occasions you need it.
As far as sex scenes go, there's nothing super wild going on here. The 'animations' consist of two images switching back and forth until the third one shows the climax, so don't expect smooth movements if the RPGM tag hasn't already tipped you off.
Most sex is vanilla, which isn't a bad thing, but it's important to keep your expectations at a proper level. One of the more risque sex scenes is behind a shelf while other characters are eating. So it's one of those 'risk getting caught' angles, but it's not going to rock the socks off you if you particularly enjoy that sort of thing.
The art, for me, if where this game shines most. The girls are cute and varied well enough as far as appearances go. They look soft and pillowy, with a few scenes of them in their private spaces just being cute. Laura sleeping is one of my favorites for some reason, but Olivia swaying back and forth in a little dance while brushing her teeth is nice too.
The cast is small but it's a small game. The women are mostly just eye candy, but they go something like this: Amanda is a spunky tomboy with an engineer flare, Laura is the quiet one with a hidden side, Olivia is the snooty doctor, and Marta is the MILF. These are not going to be deep characters as you only learn about their temporary needs and where they fit into the plot.
All in all, the length is just right for what's packed in here, and the art makes this worth a look.
EDIT: The bugs have been fixed as far as my playthrough was concerned. Also there are endings in this game. A good one and a bad one.