Aside from the major problem, this game is amazing!
The concepts for the characters, story, and gameplay are really well-made, and the graphics give it a great mix of looking like an official Touhou game and a fanmade Touhou game.
The game gives a VERY BIG vibe of Touhou 12: UFO, as the spells are hard to deal with at first and usually jumpscares you like how UFO is played for the first time.
The only main problem is, well, the obvious lag-- disabling the graphics and all makes it look dull and boring, and doesn't give it life.
Overall, I'd rate this game a ★★★✬☆. I hope you guys can find a way to fix the lag, don't give up!