In news that's likely not to surprise anyone, it turns out that classic Nintendo games are hard. As in, they have been proven to be "NP-hard" through a computational analysis of the complexity of classic video games.
Whoa, that's a mouthful!
Five of Nintendo's classic game franchises were put to the test: Mario, Zelda, Pokemon, Metroid & Donkey Kong. The technical details of the study are contained within the second source link for those who are interested. It turns out that complex problems may be solvable by turning them into video game style levels and playing them.
Me, I feel a sense of relief. It's not just the rose-tinted glasses of a young child making me think those games were hard. They really were!