Reimu would play once on lunatic, beat it through sheer luck, then never play again. She doesn't seem like the gamer type to me...
Sakuya would die a few times, then beat the game by TASing.
Remilia would fail on easy mode, get fed up, then order Sakuya to beat it for her.
Suika would be great at these games because she's always on the same wave length as the creator.
Kaguya pwns dem noob bosses.
Nitori's the one who makes the ultra mods.
In Koishi's Gensokyo, bullets dodge YOU!
Seija couldn't get past stage 1- she'd deliberately fly into the bullets.
After experiencing her own spellcard, Shinmyoumaru would never change hitboxes again.
Sumireko probably does play touhou.