This document discusses how teaching game design can be used to teach interaction design. It provides examples of exercises used in classes that have students create simple paper prototype games to explore mechanics like movement, conflict, and feedback. The document argues that game design and interaction design require many of the same skills, including considering affordances, direct manipulation, conceptual models, information architecture, iteration and playtesting. Teaching game design helps students explore difficult topics and stretch their thinking in new directions. Core concepts from game design like mechanics, dynamics and aesthetics can also be applied to interaction design.