I've just found this competition by Bart Bonte, and thought I'd share with you:

Duck, think outside the flock has been released 2 weeks now and it's time for the very first bontegames competition! Here's your chance to win a free Duck dvd or novella (as you wish). All you have to do to enter the competition is leave a comment here in which you describe a possible new level for the Duck game.

Check out details of the competition here:

The contest is over, I'm going to close this thread.