Worked on gameplay stability and reliability improvements for the cozy-crops repository, focusing on refining core mechanics using JavaScript and game development principles. Addressed a key bug by updating tool detection logic for the Till action, ensuring the system correctly identifies shovels rather than misclassifying with hoes. Enhanced stamina management by preventing negative stamina values, which improved energy accounting and player experience. All changes were implemented in player.js, reducing edge-case bugs and supporting future balancing efforts. The work emphasized careful input handling and robust state management, contributing to higher QA readiness and laying a solid foundation for ongoing gameplay enhancements.