This really cracked me up!
It's an excellent concept and design! I think the rug is what gets me to laugh (in contrast to the axe wielding Jack).
I wonder if the design would have been even better with the "N" door having a larger, more jagged crack, which would make both the "N" and reference more pronounced, and I think more visually interesting. I love subtlety, but not for subtleties sake; plus a the movie poster medium favors immediate visual realization (even if it's subconscious, it's easily visually captured).
Would also be interesting with the "N" being the elevator doors opening, with the blood splurge creating the "N" triangles. But then you'd lose the axe connection.
The skull maze, typed page, and wolf in the map, are great ideas and designs! It'd be interesting to see the maze (of the skull maze) match the carpet design more inside the skull, and then have the skull look more evil and deranged. I like the figure in the maze, but might as well make it more related and menacing by either giving it an axe, or put it in the ending frozen pose.