Through a Glass Darkly

Concept: “Your party has stumbled into a dungeon that appears abandoned, but weird things keep happening.”
Content: A slow-boil slaughterfest with an excellent gimmick
Writing: Conveys necessary information concisely
Art/design: Marvelous contrast between the two maps
Usability: Effective room nomenclature; the Notes document is a very useful, practical addition in many ways