Wow, I'm glad I checked your game out in time - very cool visual use of the loop theme! I also loved the dithering shader, wish I could've figured out something similar for my game. The atmosphere and puzzle design has been great so far (I temporarily put it down on floor 6 to get to the last few games I wanted to check out).
I was going to ask if there was any significant to the art of a Macuahuitl at the end of the hallway until I realized it was just the hallway floor plan, haha. Also props for including a solution guide with hints if anyone gets stuck but doesn't want the answer laid out. Great submission, Thomas!