The game was both incredibly cute and just ominous. Like you have this constant feeling of impending doom, interspersed with cute fluffy bunny moments.
I really like the writing style. The characters felt believable (to me) and the dialogues relatable.
Art's really nice too. I liked Mira's and Lune's design. Especially the latter's expressions. The text boxes and fonts fit well too.
The backgrounds are pretty, but maybe some other artist can comment on them. Like, I THINK there's something off about them, but it may be intentional (serving the tone). Like, probably they are zoomed-in to make them feel claustrophobic or something. Or maybe there's some issues with the perspective, idk. I didn't study art and I'm not a professional, so I can't comment on that. And also, art is functional to whatever you're doing, so I think they look really good, the artstyle is interesting and they work for this visual novel.
Sound design and music are really good too! Every track fits and helps build that strange mix of cute and dark and mysterious.
I was immersed in the story but it got cut short after opening the cabinet/mirror/thing (excuse my English). I couldn't read what was on it and then the game ended.
Anyways, I hope you finish the whole story and release it some day!