I understand this is an unfinished project, so I just cannot judge the gameplay or the assets as a whole, since obviously it's unfinished, so I'll give my opinion only based on the story and it's placement.
I don't like that the story interrupts the gameplay so often, specially if said story is quite long as this one, I felt like the gameplay itself was replaced with a vn (or maybe it felt a lot longer due the text on screen was larger than usual), for a touhou like game, the story tends to be really dense and hard to understand where is it going, simpler could be better, just saying.