I'm still not seeing AI.
As in... at all.
It's basically given a simplified graph (these keys in these rooms in this order) and path-finds down the tree to work out how to get there.
It's human-written heuristics guiding a very-limited-scope "AI" which wanders aimlessly (nothing wrong with that... A* is basically a random walk at times) and then scores itself based on a human heuristic for those "cells".
It's not AI, learning, or anything close to that at all. If this is really "best of breed" in terms of AI, then it shows what I've known all along - we don't have AI and won't have for a long time to come.