I'm gonna be honest, I like the concept a lot and the story is quite cool. I also loved those CGs of Reisen and Youmu, it looks absolutely precious!
BUT
The most important part of a rhythm game, is of course, the music, and I think, it just didn't land. I couldn't feel the beat, and I felt the control scheme kinda weird.
I would love to see this go on and become something else tho! Even if it's not Touhou related, I see potential on game like this