Instead of the Success/Failure dichotomy, where Success is generally interesting and Failure is only sometimes interesting, the primary dichotomy of the game is between Success and Twists - if you don't succeed, there's a twist and the game moves forward. Maybe you get what you want, maybe you don't, but either way something interesting that changes the situation must happen.
Non-binary resolution. Despite the simplicity, there are a range of possible results on every roll. Instead of a result indicating Success or Failure, there are four or five different possible results for each roll.