Canadian comics man Bryan Lee O'Malley, the creator, artist and writer behind Scott Pilgrim, obviously grew up loving video games. So much so that he was designing his own Super Mario Bros. levels.
Here's one he drew around 1990. Rubine City. A city with sewers! Which not only looks incredibly detailed, but also claustrophobic and impossible. Which may explain why he went into comics and not video game design.
Did anyone else do this as a kid? Like he says in his blog post showing off the image, "i have like a ton of this stuff". I remember wasting entire days at school designing new levels for Super Star Wars and, for some reason, Landstalker.
Super Mario [RADIOMARU]