The wording is pretty interesting-- the categories sound a bit more like descriptions of the products rather than tailored to contest categories. For example, "Rescue the fair maiden from the clutches of your enemy! Build a good or evil tower with a jail, cage, or locked room." It implies that "you" should be doing the rescuing, and that "you" have an enemy.
Note also that "you" are the "good guy" in most of these descriptions... But then check out "Can you hold on to your prisoner before he is rescued?" Suddenly, "you" are the bad guy! I'm picturing kids taking this literally and pitting themselves (in minifig form) against, say, their teachers or the school bully