I have some feedback.
First of all, stellar production, very promising VN!
I love the characters. Maybe put one of them on the cover, since they're so attractive? It might help draw people in, I know it would apply to me.
The graphics are so nice! I love the art style, and the moving backgrounds.
There's a audio loop of moving water, and it's very obvious when the loop restarts, as there's a cut or an abrupt sound at the end.
I encountered some bugs as well, but I guess it's to be expected when building a game from the ground up.
Unity is certainly capable than much more than the still image game play that Ren Py can offer.
After I took a picture of the little figurine, and the daydream/nightmare occurred, the screen goes white. The first time, the screen stayed white and I had to kill the game.
Next time, the dialogue sort of bunched up, multiple textboxes superimposed on each other, as I remember. I did get to move on though.
[FEEDBACK ON THE TUTORIAL SECTION]
This is subjective, take it with a grain of salt.
I admit I skipped through the tutorial, since it kept bugging me. I prefer to find things out by myself, and not be forced to read a bunch of messages, when I want to advance the story instead. I was getting increasingly impatient about it, and just skipped through it after a while, since it felt like control was taken from me, and I was put through school. Again, I much prefer less hand holding, so this is subjective.
Lastly, I've been enjoying various VN's posted on this site for the last year or so. I've been thinking of offering to produce music for a VN. I noticed you already have some music. If you'd like, I'm offering to produce some more. Free of charge for now, I'm only looking to contribute for the joy of it.
I have a soundcloud that admittedly I haven't been posting much on for years, but there are a couple of new minor projects on there;
I'm mostly on Youtube these days, but that's a different style of music less suited for a visual novel. Anyway that was just an offer, you mayb already have what you need in that department.
I wish you all the best with the project!