Andrew Theiss developed a game expansion for the sozalpasan1/HWKartKlash repository, focusing on customizable karts and maps to enhance gameplay variety and user engagement. He integrated new features such as multiple maps, power-up concepts, teacher abilities, and the Cafeteria Chaos map, consolidating all designs into the main branch to streamline future development and reduce integration risk. Using Markdown for documentation and leveraging skills in content integration and game design, Andrew extended core gameplay concepts to support greater customization. The work demonstrated depth in conceptual design and careful integration, though it was limited in scope to feature development without bug fixes during the period.