Concept: “Greed, gore, romance? None of that matters as long as you can get to the hidden vault” 
Content: A lovingly macabre manor crawl.
Writing: A tragic love story (of sorts), reenacting its terrible pursuit this night for your voyeuristic pleasure.
Art/design: Full of coarse texture and bright color, a feast for the eyes, with a surprising emphasis on the eyes.
Usability: I'm not joking about the eyes. I may have exaggerated the voyeuristic pleasure.