I just discovered this today. It's not random, but made up of preset patterns or preset pattern segments. I always start on the right door and move left, one door at a time until I hit floor 4. At 4, I stay on the far left door on 4, 5, and 6, before moving right on 7. On door 9, I am again at the far right where I repeat my pattern and go doors 9, 10, and 11 on the far right door before moving left again. In the last two weeks I have discovered that there are preset patterns in Eagle mountain and I have been able to figure out part of one of them. I don't have hard data as I don't have enough time to record every door choice. But I can say that I have begun to know exactly when I'm going to hit a pig on a few of these patterns. What that does to the overall EM pattern, I'm not sure, but there's definitely a pattern to the doors and their rewards. I got identical door rewards matched to the door position (starting at floor 1) for two runs where ALL 8 doors for the first 8 floors were carbon copies. On another run a few days ago, I did two back to back runs and hitting pigs on the same floors on the same door going up to floor 33 and walked with matching rewards. I'm putting this out there for someone, to take and run with, with a lot more time and resources. This could be solved through brute force (simple test and repeat) or machine learning, though I'm not a coder myself. Who knows if this will go anywhere but I definitely think there's some pattern-ization to the EM mini-game.