I think this game is shaping up to be decent. Only specific item I would point out for critique is that I think you should consider how to implement different options, Dob.
So far most material (if not all of it?) is a choice between "Do" and "Don't," which is fine, it's nice that it's not a static VN that forces you to fuck everything. That said, I think it would improve the player experience if we got some options of kinks and sexuality to choose between down the line. There's been a load of lesbian content so far, which I'm a big fan of, but I hope there will be more options than Inertia's immediate family. If it wasn't for her direct interest in Inertia's father I'd find green-makeup-girl a promising prospect for example.
Same goes for the childhood friend dude on the straight side. I find him to be somewhat of a wet rag, not a dude I'd personally be attracted to. It'd be nice if Inertia could meet some men that don't connect directly to her family, like with the female options I mentioned. She's coming of age after all, so it would make sense for Intertia to go out and meet (and/or fuck) new people.