A very promising idea, but unfortunately for now I feel like the effort is misplaced.
At the core - the developer has the right idea: beautiful graphics(optimized too!), very customizable character creation, and a basis for perverted interactions.
The problem is that this basis is very shallow, and once you've seen a beautiful model or two - you'll realize that there really isn't much in this game, at least at the moment.
First of all - unnecessary clunkiness.
-the controls to position certain magnetic holders are too ragdoll
-the dematerializer gun can not only destroy the cloth and the subject, but also the floor, which is fun once or twice, but then you feel like there should be an option to disable, at least in cheats
-the connections for sucking apparatus aren't too intuitive or intricate, and could as well have been streamlined and automated, because it's not like you can suck something unexpected, and I don't even know the purpose of the 2nd sucker, it applies only to the mouth and it didn't suck saliva. Unless maybe the arousal should've been higher or something.
Then - lack of proper perversion. In all honesty - one youtube prudish comment called it a rape simulator - and it really isn't. This is about you getting your VICTIM off, not the other way around. Yes, you can hit your target, yes, it can die. But the physics and the reactions are so limited(there's only hitting, spanking and tazing) that you practically wonder - why are they there at all. Don't get me wrong, I'm grateful for even that much sadism, but for a "heroine rape simulator" I think there's a lot more ways to "tickle and stimulate" your victim, rather than punish and torture.
And then there's the stupid mixing game. Yes, there are cheat serums(that don't spawn in some versions), and yes, this mixing game is pretty much the only "gameplay" you can have(aside from some machines that you can configure just for her pleasure), but even if the game was more "vanilla" and less deviant - could the dev record more voice interactions related to arousal? Yes, orgasm has like 2 versions, normal and edged, and the latter is like pissing all over the floor and getting killed in a video game(loud and shouty), but that's it. Everything else is just the same 2-3 sounds, no real facial effort, no body reactions. The sex is plain boring here.
Not to mention your limitation of needing the target to be in a suitable position for insertion and being UNABLE to do anything else. Like beating, stranling or at LEAST groping your victim. Looks like the dev should take notes from Purin-chan's Bath\Gym.
And the reason why I'm saying that the effort is misplaced - is because there's really too much work done on the tutorial and the portal robot parody, on the UI, the aesthetics. Which are nice, but given the limited scope of the game - did the dev really need to hide obviously necessary apparatuses, spread serums and different interactables all over, add all the idiotic unlockables and achievements(for the lack of actual gameplay)? It makes for a better selling product, but not for a better game.
I hope that if the project isn't abandoned, and all that groundwork is properly used and filled with more options - I could come back and give it the 5 stars the game deserves. But if it's released in a similar state, with just a bit of more polish, or even abandoned, then I would know that the developer had wrong priorities and this game shouldn't be overrated.