First itch.io project I'm commenting on, but really wanted to tell you how much I enjoyed this! It's 100% my kind of game, and I couldn't stop playing it. Did everything I could in one sitting. Please keep up the good work on it! Atmosphere, setting, characters, mechanics are all really good and will only get better I think :) I want to see more of the world.
Similar feedback to others, but #1 is I'd say definitely hire an English editor. Your writing is really good and engaging, tons of new interesting ideas and perfect content-wise, so I'd just want it to be cleaned up as much as possible whenever it goes to wider public release so that everything that's good about it can shine through (I say this speaking as an editor). All writers, native English speakers or not, need an editor!
As someone who also got stuck at the dolmen, I think something as simple as highlighting possible bits of text you could search in a different color or something would work well. Like: "You see a firepit with some scattered bones. The wall is marked with soot."
The text input mechanic worked really well with asking the barkeep about people, though, and being able to reference the journal made it super easy. I think there's very good ideas there that will easily polish.
Oh, maybe this was just me, but for the longest time I couldn't figure out that I could just click "Rest" and "Leave" any time they were there. I was so focused on the dialogue and story text that I wasn't paying attention to the menu. Maybe some text prompt that just says "You can Rest here" or "You can Leave from here" when you're in an area where it's possible.
I loved the "character creation" type choices in the text, where you picked a class and equipment and stuff. I think filling out a character in that way is really cool and would love more of it.
Finishing the demo by returning to the city and everyone being disappointed in you was kind of a bummer lol. Maybe include an option that clearly ends the demo while still in the peninsula?
That's all I can think of for now, but am definitely following this game and excited to see more!! Keep it up!