Shigeru Miyamoto on Super Mario Bros. Level 1-1

Legendary developers Shigeru Miyamoto and Takashi Tezuka talk about aspects of game design from the iconic level 1-1 from the original Super Mario Bros. game.  Miyamato explains how they designed the level in a way that allows players to better understand how the game elements and mechanics work together.

Extra Reading: Excellent analysis from Anna Anthropy on Super Mario level design here and here.