Pros and cons are down below) Check out gameplay here (the game is the 4th there):
Advantages:
1. "The game in the game" is a very nice idea. I loved the atmosphere of each area.
2. It's nice that the scares are simple but still effective. Maybe it would be cool to work a bit more on monster sound cues. I guess if the monster would have a definitive sound, you could use it even when it is not on the screen. (Like make it feel like the monster is behind the door or the walls).
Disadvantages:
1. The scare when the monster is hanging from the ceiling could be more powerful if it would happen closer to the player (and louder). It doesn't have to be a jumpscare - you could build up the tension using monster sound cue above the player and then the monster would appear for a split second, for example.
2. The ending is a bit anticlimactic. It does not feel menacing to see the monster behind the window. It's even a bit hilarious to see it's nipples pierced with chains. Different sound design would help a lot there.
3. The game feels empty - you can not really investigate stuff or interact with anything. The details (even unnecessary details) are always welcomed in such games, they make the experience more entertaining. I always encourage to create epilogues or show like "investigation reports" or stuff to make the ending more satisfying.
Overall:
I think the game is good. Still, there are lots of places that need further development and polish. I will rate the game 4/5. I would recommend you to pay more attention at sound design because it's extremely important for horror games. Also, never forget that the devil is in the details. It takes a lot more time to create infinitesimal changes or interactions but it always attracts players' attention and admiration.
Hope my feedback was useful!