Yeah, this has the 'sauce'.
Really well implemented minimalist layout, I love how you used the black background for the keys and flavour text. It hits the pulpy Appendix N. itch, I could easily shift it into other systems, but feels right at home in Mythic Bastionland.
The black text for the room keys does feel slightly to small, or perhaps the line height is a bit too narrow? It makes it slightly hard to read, a slightly less weighty font for that text or a larger font size with a bit more spacing between each line would make it more legible (not sure if your chosen font has a 'light' version). Can't wait to run this!