Genius Bonus: the chess match log in chapter 5 is a valid chess log of an amateur game.
Tear Jerker: Reimu and Marisa's deaths and the aftermath thereof
Maintenance Override:
Genius Bonus: 4564756361746f72 is a hex string for a word Educator and section separators translate from Morse code as “there will be no happy ending”.
The Scrappy: Luxia is a shallow, completely unsympathetic protagonist.
Shards of Obsession:
The Un-Twist: The idol of Pazuzu is really just a piece of metal. Pazuzu corrupts the world from outside.