Really like the visual style. It's eye-catching but pleasant at the same time, somehow. Audio could really push the mood further, in my opinion -- even just a simple page turn sound. And then with some extra sounds, like for the people and the trees, it would be great, I think.
Gameplay-wise, things clicked for me after a couple pages, but I was kind of confused at the beginning because I'm a big dummy and actually did not recognize what I was supposed to be describing (I didn't look at the screenshots on your LD page beforehand), so most of my notes are actually about that opening page: - The biggest issue (which I learned on a subsequent run) was that I wasn't looking at the screen when the sun rose into position. If I had seen that, I probably would have understood. This is arguably my fault for not paying attention. - But once I was looking at it, I couldn't really tell if the yellow circle was part of the picture, or just a UI thing highlighting a specific part of it. I'm not good at art, but I would have expected the window to be blocking parts of the sun, if it's in front of it? I don't really know if moving the sun into the background like that would help or not, though. - Another thing that might have contributed to the confusion is the "What is this" text being "inside" the window. To me, that text feels "meta", like it's an instruction to the player, so it ought to live "outside" the gameplay picture -- so the fact that it was inside subtly confused me about whether or not the window frame was actually part of what I was supposed to be looking at. (I probably didn't explain that very well, sorry) - The most prominent feature of that picture to me, is the knob-cross thing in the center of the window, so I was wondering if I was supposed to name that. But I don't know if it's a cultural/regional thing, but I've actually never seen a window that looks like that, with a handle-like thing in the center, so I was really at a loss.
It's a minor thing, but for the tutorial text that appears afterwards, seeing "to fill in that" up above the "Use it" text is a tiny bit weird, I think. I wonder if having the upper text appear first, like "Fill in this..." and then the bottom text "..using this" would read better.
For the page with the door that gets referenced later on the portal page, I think the sentence is a little strange. The portal says "managed to open one ___", which really sounds like it wants "door", but that would make the door page say "I think I'll just go and explore the door", which doesn't really make sense.
A couple quality-of-life things: - I couldn't find any way to choose a different word after I had already picked one. I think it would be nice to be able to change your answer before hitting enter, in case you change your mind, or you just misclicked/fat-fingered. - Having the pages remember what I typed previously would be nice, especially since it didn't seem to actually overwrite my previous answers (though maybe some did, and others didn't?)
All in all, nice work!