I was googling around and found some Xbox 360 controller drivers to work of your computer! (yay it works with PC and MAc OS, sorry Linux) So I downloaded it and installed it and soon found out that Clonk supports controllers and gamepads! So I plugged in my spare, wired controller and tried. After a little bit, eventually
yay v9 reference! I got it to work amazing well, and it actually amps up the smoothness in control. On the Mac OS, a preference pane is created to fully control the controller (E.g. inversion). Windows also I am pretty sure has one.
This should work for the demo too! By the way I am forced to use a Mac to access the internet seeing that my Windows is offline. Don't forget that the driver can also be used for other games that support controller usage! These drivers work for Wired controllers (preferably) and Wireless seeing that you have something to connect to for your computer...
DriversWindows:
http://www.matt-land.com/xbcd/ (Sorry no Vista-specific drivers on this page, maybe XP drivers will work)
Mac:
http://tattiebogle.net/index.php/ProjectRoot/Xbox360Controller/OsxDriver (I liked this version best personally, OSX only!)
  I was messing around with the controller and found out that there are only two "bugs" if you want to call them that about controlling Clonk with the XB360 controller.
One: DO NOT select the "Control Menu with controller" option in the controller setup section in options, it will randomly mess around (lol) in your options panel. Its very annoying.
Two: You can not abort a running game with the controller, keep the muse out of the way, even though you are controlling with the game pad to abort the game. And just a tip, plug in the controller before you start Clonk, I got better results that way.
Heres a layout of the controller map that I recommend for you
* (Set the controller layout in the options tab, preferably "GamePad one" you have to manually set the configuration in options, it won't work automatically.)

All in all, I think that it is worth it playing with the controller, have fun!
Wait.
Radical You can host? No
If so
Add me on Steam Don't have it, sorry
Sirc000
~End~Â lol