During a one-month period, this developer expanded the sozalpasan1/HWKartKlash repository by implementing a game expansion focused on customizable karts and maps. The work involved integrating new gameplay features such as multiple maps, power-up concepts, teacher abilities, and the Cafeteria Chaos map, all designed to enhance user engagement and retention. Using Markdown for documentation and content integration, the developer consolidated all new designs into the main branch, reducing integration risk and ensuring cohesive gameplay experiences. The approach emphasized game design principles and thorough documentation, resulting in a single, well-integrated feature that broadened the scope and replayability of the project.