Given how well games like Mario have been mastered by machine learning algorithms (to beyond expert human levels), I doubt a motocross-maniacs-style side scroll

Given how well games like Mario have been mastered by machine learning algorithms (to beyond expert human levels), I doubt a motocross-maniacs-style side scroller would present too much of a challenge. It would be interesting to see what, if anything, they've changed in the game to make it harder for a computer to play.