In fact, the site behind these mock-ups, SimplyAwful, is dedicated to making all sorts of custom labels for both real and fake games. There’s lots of hot stuff here.
Maybe someone will actually build a homebrew NES project based on these mock-ups at this weekend’s Adventure Time Game Jam (as detailed by the recently launched and Venus Patrol)? How math would that be?
Preorder: Adventure Time for DS and 3DS See also: More mathematical Adventure Time posts [Via SimplyAwful's Tumblr]