This is so fun. I really like the expansion of some of the rarer Touhou lore (I had actually forgotten Joon became a buddhist) and the humour is great. The art is really good and conveys the character expressions well, which I think could be useful if you do intend to make a sequel i.e. a character’s face betrays what they say. Or maybe that’d be too hard - I didn’t actually mind the puzzles being quite straightforward.
Anyway, it’s fantastically written and tightly executed. One of my favourites!