Hey, tried the game out and wanted to come on here and leave my thoughts which are mixed, so let's get the not so good out of the way first:
Most of the gripes I have are about the writing, and while this is not to say the writing is entirely bad (as I will elaborate on in the good section), I think there are some things that need to be said.
-In the sections where Joseph is thinking/talking to himself while awake, he is extremely unlikeable. I get that he's not supposed to be a good guy but the way he talks about himself and about others is extremely one-dimentional, there is nothing in there to pull in the reader, no vulnerability, no remorse, no contemplation, it's just "I go out and fuck all these girls and make them my bitches because that's what I do, I'm simply superior and they are simply inferior and that's that". It feels like all he cares about is the power dynamic to put women down and make him feel good about himself, due to having the power dynamic inverted against him in his professional life. I feel like some ways to improve upon this could be both to include some more back and forth contemplation (like asking himself if he wouldn't rather settle down and form a relationship with someone or if he wouldn't prefer the girls to fight back against him for once, even if the answer is always no, the simple fact that he has the courage to ask himself those questions would do a lot for him as a character) and to delve into other areas of interest more deeply like sadism, for example, where he actually gets off on hurting the girls instead of just looking down upon the fact that they like to be hurt.
-The dialogue feels extremely blunt. Even Samara, who is supposed to be somewhat offput by how rough/blunt Joseph is, has almost equally blunt dialogue, and the stiffness between the two also ends up making the sex scenes feel awkward and clunky to a certain degree. I saw in another comment that you're based out of Poland so I can imagine that some of that can be down to English not being a first language, so it might be a good idea to pass the dialogue specifically through the hands of a native English speaker before putting it into the game to see if they can polish it and make it flow more naturally. Another thing you can do by yourself is try to deviate from always defaulting to sir/girl when they talk to eachother, the repetitiveness almost feels robotic, and even after Samara asks to be called by her name it keeps going. Throw in the odd "little lady" or "doll" here and there for Joseph and "mister" for Samara, spice it up and it will go a long way towards feeling more natural.
-The horror/stalking element of the story feels like it's advancing a little too slow, like in terms of the frequency of paranormal events it's fine but in terms of finding clues about what's actually going on and understanding it, it's slow enough that it actually feels like we know less and less about what's going on as time passes instead of more and more. I leave this as a minor complaint because I know you have more episodes planned out so I don't want to immediately assume that's how it's going to be through the whole game, I just wanted to make you aware that it might be nice to throw the reader a proverbial bone every once in a while to keep us in the loop, otherwise that "slice" of the story ends up taking a backseat compared to what's going on with Samara and exploring Joseph's backstory.
And now for the good part, since there is a lot that the game does well:
-I really like the artstyle, I feel like you have captured the vibes and aesthetic of horror very well and I also liked the how you handled Samara's design, she feels odd and cryptid enough to be offputting while also being cute enough to empathize with and, of course, attractive enough to fall for. The little details like the veins in the scene where the painting falls really do a lot to blend that line, and the poses and expressions help understand her even when the writing falls a little short. I would also like to extend my compliments to the way you handle lighting as it makes everything feel much more alive and adds a lot of character.
-The dream sequences are enthralling, and the way they open Joseph to examination is well done. This is one of the reasons I was harsh on the non-dream sequences as well, as there is so much potential here that you could have "bleed" into the overworld as well instead of just having it tightly locked behind his subconscious to the point even the mysterious entity we talk to struggles to get him to open up about it. I get that from a writing perspective you want to keep some cards close to your chest to make moments down the road more impactful but please, give us some more of this part, it really goes a long way in getting us invested into Joseph as a character and into your narrative as a whole.
-You have a pretty convincing representation of writer's block, and it helped connect with Joseph as a common struggle, so don't shy away from that tool in the future, even if he has "cracked the code" with Samara as his inspiration.
-The paranormal events are really well done on all fronts, from the visuals to the writing, the feel/vibe and the very good depiction of phenomenon like sleep paralysis, I think you really hit the nail on the head in that regard.
All in all it's a pretty decent game with a goldmine of potential, and an untapped market due to its genre. With some more dev time, more episodes, and some polish, I think (and hope) that it will grow into something great! <3