One of the most epic "Automatic Mario" levels on the internet, for sure - Not only does the stage play itself (You don't need to press a single button), but it plays music as well!
Link: http://www.youtube.com/watch?v=OM0ib4Gx ... re=related
Note that the description has a link to the MP3 of the music playing, and an IPS file - This is a ROM patch file, so if you have a Super Nintendo emulator and a Super Mario World ROM, using a program such as Lunar IPS to patch the ROM will load this level, except (as far as I know) you can't restore it to the original ROM after.
Another Super Mario World program that might be useful is Lunar Magic, a hacking program for Super Mario World, that lets you make your own levels, overworlds, tile art, and, if you know enough about hacking, you can make your own custom blocks. Try using Google to find it.
