This Hands-Free Super Mario World Level Plays Sweet, Sweet Music

http://kotaku.com/387830/this-hands+free-super-mario-world-level-plays-sweet-sweet-music

“By now, you must have seen the custom made Super Mario World levels that require no player, no controller to pass. They simply let Mario and Yoshi do their thing, as buttons, switches and blocks boost them through each level. None of those user created levels are as impressive as this 11-minute monster, which uses the sound effects from those switch-hits and Koopa Troopa stomps to make beautiful music. …..”

Unfortunately there’s no obvious way to embed this video.

It’s definitely worth watching though. Some people have a lot of free time.