Shigeru Miyamoto has designed dozens of the most popular video games in the world: Donkey Kong, Super Mario Bros, and the Legend of Zelda among them. In this video by Vox, Miyamoto shares how he thinks about game design.
This is one of the first times that a video game’s plot and characters were designed before the programming. [Miyamoto:] “Well, early on, the people who made video games, they were technologists, they were programmers, they were hardware designers. But I wasn’t. I was a designer, I studied industrial design, I was an artist, I drew pictures. And so I think that it was in my generation that people who made video games really became designers rather than technologists.”
Also worth watching is this video by Game Maker’s Toolkit about how Nintendo builds everything in their games around a fun and unique play mechanic.
It seems to me that these two videos slightly contradict each other, although maybe you’ll disagree.