If you don't have five minutes to watch it, the summary is Super Mario 3D World uses the Japanese idea of Kishōtenketsu for introducing mechanics at a per level scope.
Kishōtenketsu at a very high level:
- Ki: Introduction.
- Shō: Builds upon introduction.
- Ten: Turn or twist.
- Ketsu: Conclusion.
Interesting to think about for interaction and story design.