Over a two-month period, contributed to the libgdx/libgdx repository by developing and enhancing core APIs in Java, focusing on XML parsing and data structure utilities. Implemented new methods in XmlReader.Element to enable more flexible XML child element access and replacement, improving manipulation capabilities for developers. Enhanced the FPSLogger API to allow configurable logging thresholds, reducing unnecessary log output. Expanded the Array class utilities by adding replaceFirst and replaceAll methods, increasing consistency and robustness in array operations. All changes were accompanied by updated documentation, ensuring clarity and maintainability. Work demonstrated strengths in API development, Core Java, and data structures.