Developed and integrated a new Hotbar UI feature for the PurdueSIGGD/SIGGD-GAME-2025 repository, focusing on enhancing gameplay user experience and laying groundwork for future inventory improvements. The work centered on building a 3x3 grid of nine clickable slots to streamline item selection and inventory management within Unity, utilizing C# for implementation. The developer refactored existing UI components to support the new layout, updated automated tests to ensure alignment with the redesigned interface, and maintained a clear, well-documented commit history. Emphasis was placed on code quality, test reliability, and extensibility, with robust documentation supporting future development and sprint planning.