This thesis focuses on the design of an educational generative AI literacy game. The goal is to create a playable game prototype that helps young adults distinguish between AI-generated and human-created text and images. This topic is important because of the widespread use of AI-generated content, which people have difficulty assessing the authenticity of, and the resulting game prototype aims to address this problem. The thesis documents creation of both low-fidelity and high-fidelity prototypes, as well as the steps taken to adapt the design to user requirements and preferences. Upon completion of the game prototype, user testing will follow to evaluate whether the game supports understanding of basic AI literacy, as well as to get feedback about user engagement and overall satisfaction with the game experience.