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.
[BUG]
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.
[MUSIC]
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;
https://soundcloud.com/hardts
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!