Introversion Drop "Treasure Hunt" Clue

Hmm! Introversion are up to something. They've sent us a mysterious image, which you can see below. They tell us it is part of some kind of treasure hunt thing. PCG have the first image. The email from Introversion reads: "The clues are all from Introversion’s next game Prison Architect, and showcase Ryan Sumo’s amazing art. Some of the clues are buried in the Humble Introversion Bundle."

Intrigue-o-tron!