This was a fun read, using an excellent idea with some good execution all around! I didn't expect a DDR-style timing-based battle system - and I tend to enjoy action elements in RPG settings.
The writing itself took a novel idea and ran with the execution quite well. The unhinged ultra-violence adds a humorous aspect as the story goes on. (It's a classic with Touhou!) Although the writing is riddled with typos, the theme was used phenomenally, and so I enjoyed it the entire way through.
Otherwise, the music does what it needs, and the game has some really nice portraits and background work. I can tell that a lot of love was put into them!
Overall, given the RPG Maker format, this was an excellent take on the visual novel formula. Excellent work!