A new version (0.2) is out which allows you to hide the click box and turn off auto move for some 2-player fun (check the configurable vars section of the lua file). Get it at http://morphcat.de/lua/

You will need FCEUX to play this script, download the latest release at http://fceux.com

It turns Mario into a Lemming by disabling controller input and making him run in one direction until he hits an obstacle. Use your mouse to ward off enemies and safely lead him to the exit.

If you've played Kirby's Canvas Curse on the ds this will look very familiar.

As you can see, there's still a lot to fix, the video shows off a few devastating bugs. :P
Recorded at 25% speed.