I personally don't see the merit in recreating a part of EnReCo as a Visual Novel, but I've combed through the review section and it would appear that my opinion is rather unpopular. I think your sprites are cute, and the storytelling itself is fairly solid. The side events were fun too (Though I was also plagued by Elizabeth for the majority of the playthrough)
I do think the "ambience" is lacking in some areas. Some backgrounds feel a bit plain to me, and some sections have odd transitions with the music or music that doesn't really fit the scene that's playing out. Things I feel are really important for a visual novel.
The sanity mechanic is also a bit lackluster, it felt irrelevant for most of the run. The only time it mattered it was locking me out of an alternate path that might have been interesting. Usually penalizing the player for doing a thing well is bad.
It's been mentioned, but you might've suffered a bit for your choice of engine too. Unity's UI is rough, and this game is all UI.
Even so, you pulled it off and a lot of people liked it. Maybe that makes me a hater.
Maybe having a hater means you've made it.