Boy, you need to rework this whole thing, imo. The sandbox adds nothing but a bunch of extra clicking, and the MC is fucking pathetic. Seriously, he STOPS Karen from giving him a handjob, mid-handjob? If I want to be this pathetic, I'll just live my life.
Honestly, the characters are hot enough... you seem to have an arc in mind for Melissa, at least... just delete the sandbox and alternate between character scenes. Especially when sometimes you HAVE to view a certain scene to see any others, anyway... such as any scene in the kitchen except the one where you need to click on the coffee machine. You can't go anywhere except Alice(?)'s room and the bathroom until after you go to (and thus trigger) the kitchen scene... so why not just make it linear? And give US actual choices. Not just, "Herr durr, do I look closer at her pussy or anus?" but like, when Melissa is passed out, drunk, do we try to do anything to her? If she seems to stir, do we risk going further? And if we do, is it game over, or does she like it? Considering how aggressive she was on the plane, I think she'd just get into it.
You could focus way more on the story if you didn't have the dumbass sandbox that doesn't do anything.
Maybe your plan is for Evilina to actually give us some demon mind-control power or something? (though it seems to be a fake out and not actually supernatural, given the daytime scene with her) Then the MC could have confidence? But, like, half the cast are already throwing themselves at him. NOBODY is stopping a handjob WHILE they're getting it. Just make him less pathetic.
Edit: I'll add, when Alice(?) says she's gonna go sunbathe, like the other dude said, she should be out there, sunbathing. You should be able to spy on her, or maybe go out and join her. Why is nobody sleeping in their bedrooms at night? Rather than letting us go in and see them empty, at least have them be locked at night. The 2 girls might believably do that, rather than just LET you perv on them or something. Karen wouldn't, of course. She should be in her room, sleeping topless or naked. I get that it's an early release, but goddamn this sucks, dude.
Sorry for being harsh, but I'm trying to give helpful criticism if you can look past that.