Callista Kendall developed core gameplay systems for the PurdueSIGGD/SIGGD-GAME-2025 repository, focusing on player and resource management as well as hunger dynamics. Using C# scripting within Unity, Callista introduced a StatData class to centralize movement parameters and player state, enabling more precise tuning and future extensibility. The new hunger system incorporated stat decay and health interactions, with supporting updates to assets and scripts to maintain gameplay balance. By consolidating these features under a unified codebase, Callista reduced future maintenance risk and established a foundation for data-driven balancing, demonstrating depth in system integration and thoughtful engineering for long-term project scalability.