Hello and congratulations on your game release! I'd like to preface this post saying that I'm not a fan of the horror genre, and I'm not a professional in UI development, but hopefully some general opinion can be helpful.
For your first question of some game UI recommendations, unfortunately I haven't played enough horror games to suggest anything particularly similar to your style. A few keynotes from games such as Silent Hill and Amnesia though is the very clean interface. Granted I'm a little biased on minimal UI design, but I think from your screenshots it's just fine. What I would suggest is changing the overall style of how your UI is pushing your theme.
What I mean by 'theme' is the mood, feeling, or atmosphere a game conveys through its style. A notable example I can think of is the fog in Silent Hill and the gritty style that comes with the gameplay.
I really like the serif font you chose to use with dark backgrounds and think this is a great choice with a horror game. Silent Hill and Amnesia both use these serif fonts when examining text. (Example below)
You've already mentioned some good improvements, such as removing the scroll, but for the style I would suggest avoiding boxes around your text. Below are some screenshots as examples.
However, if you want to keep this border around your text, make it consistent with everything. Right now in your screenshots, I can see that the "Elf's Room", "Cell B", Music and Exit icons, and examining text on the bottom picture all have these outlines, which is okay but inconsistent with the lady's text in the first picture.
Here is another example from a game called "9 doors 9 persons 9 hours" that uses outlines on everything.
My last suggestion would be changing the icons of the mail and cellphone. These icons would be good for a more graphical kind of game but seem out of place with the realistic women and background. Maybe an actual photograph of a cellphone and envelope would fit better? Note that if you choose to keep the outline style and want to keep these icons, I would suggest making them a little more straight and less hand-drawn looking. This way the straight lines of the icon could match the straight lines of the outlined boxes.
Anyway, I think what you have is awesome and congrats again on producing a finished game! If I get a chance to play, I'll leave a more thorough review. Hopefully some of this was helpful to you, and I'm sure whatever you choose to do will be great. Good luck with all your adventures!
