Maxwell could end the universe with a simple adjective and can manipulate reality by himself. His parents saw he was spoiled and sent him to the real world, but they didn't realize their mistake. They turned a lazy kid into a monster who will cause terror in the whole world. They gave 2 special items to the wrong person, and he will do anything for entertainment, like feeding his brother babies and committing terrorism and getting away with it. Maxwell is controlled by the player, but almost everyone commits atrocities, and with that, Maxwell is now evil and likes to play being god. So, that's why Scribblenauts is a game where the sky is the limit in terms of immorality.