Super Mario World level-editor

If, after all these decades, playing Super Mario has started to lose its fun, you can always hack your own levels using this Super Mario World level-editor:
Lunar Magic is a level editor I created for Super Mario World (SNES). It's the first and, as far as I know, the only level editor available for this game. I began looking into making an editor for it shortly after releasing the SoM VWF patch, mostly on a whim to see how hard it would be. It wasn't intended to be a long term project, but things would turn out otherwise...
Link (Thanks, Mark!)