this is one of the best touhou games i've ever played but here's two thing i hate about it:
1.the lag, i know my pc isn't a beast but still the spellcards renders the game literally unplayable
2.the rain effect on the beginning of stage 1 (the one that fills the whole screen and not the background). not only it causes so much lag but it's also ugly yeah you can disable it in the settings BUT that also turns the backgrounds into a static image which isn't cool at all