Alright, I'll give some constructive criticism. I'll judge this from a demo/proof of concept standpoint, as its clear this is a beginning build. It runs fine for me with all settings at its highest (Note: I have a RTX 2080 and a Ryzen 7 2700X so there isn't too much out there for me that can't be run so results may vary).
Characters: They are pretty bland, they remind me of the characters from LifePlay. With tweaking and extra attention to the models, I'm sure they can look pretty good. What bothered me the most was the hair. Each character's hair is a bit jarring but like I said, it would take some tweaks to make them look better.
Animations: Not many but overall the ones available aren't bad (the sex ones). I would suggest working on implementing multiple positions that can be used in each encounter as well as a speed button. It would cool to see a system implemented like how Koikatu does when the faster or slower it goes, the animation changes slightly to be more realistic. <-- I know that's a tall order but it would be cool to see on day. One thing I would suggest highly is a POV button to give the player freedom with how they want to view the scene. Other animations are pretty general though I did notice that the characters teleport to their next spot, not walk to it so I would work on trying to implement that into the gameplay as well. Once exception is how the player character walks. It kind of reminds me of
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so I'd work on tweaking that as well.
Setting: Looks like a general house from Daz. I would work on first making the interior more detailed. Make objects like sinks, showers, toilets, tvs, even furniture accessible and interactive. Once the interior is detailed, I would work on creating an immediate outside, backyard, pool, patio, garage, shed, etc. From there I'm not sure what your plans are, but I imagine it'll eventually include places outside of the house like shops and offices. I'd take it one at a time and add as much as you can before moving on.
Plot: There is no plot. That's fine since this comes off as more of a proof of concept than anything else. I think we all know where the plot will go with this one. I'm not necessarily complaining but it is nice to have a unique plot once in a while. It'll be interesting to see where it'll go.
I'll give it a 4/5 judging it from a demo/proof of concept point of view. I'll keep tabs on it as I enjoy 3d games. I hope to see improvements in the future as I think it can going somewhere.