Megamari: Marisa no Yabou

Patchouli Knowledge has finally had enough of Marisa — and Alice — walking into her library and taking books without asking. She moves her entire collection deep into a mechanized fortress, fills it with traps, and enlists several other Touhou characters to stand guard, each of whom has their own unresolved grievances with Marisa. Marisa and Alice set out to fight through all of them, absorb their powers, and make it to Patchouli's castle for another haul.