fkkcloud has created a game based on machine learning. It allows people to create their own map, and an artificial neural network will try to learn its pattern and create a map based on the players gameplay.
To be honest it plays like an insane take on Flappy Bird. You start as a vampire that jumps to avoid the spikes and collects blood in the process. Get enough blood and you turn into a bat that can fly and fart its way to the end scroll. The levels get progressively more challenging, and the "Challenge AI" mode is insane!