for a first game this is super good! the art is nice, the color scheme fits the vibe well, the story is both good and well written, its nice short and sweet. my only issue(s) is the description of the eldritch monster in the intro, which (seeing as you can see her) is a bit repetitive imo. my suggestion would be to use it to add to character depth (eg when mentioning the eyes say something about not wanting to be looked at)...
one other thing, the fact that you can only read one part of the book is a bit weird. i thought it would be used for a secret ending (eg something like "i know eldritch people like protein, so i thought protein powder would make a good gift" "or here is this plushy, it has huge sentimental value") you could still have the same ending, just a bit of extra dialog, plus it might help learn the system a bit more ¯\_ (ツ)_/¯ over all 9/10
(hope this helps and i'm exited to see you continue)