Worked on improving the stability and reliability of the ppy/osu and ppy/osu-framework repositories by addressing critical bugs affecting development and gameplay. Focused on C# programming and debugging, the developer resolved a crash in the settings changelog overlay within osu, enhancing the robustness of the settings UI during local debugging. In osu-framework, they implemented zero-division protection in physics calculations for velocity computations, preventing runtime errors in FloatSpring, DoubleSpring, and Vector2Spring classes. These targeted fixes reduced crash surfaces and improved the reliability of core gameplay and physics simulations, supporting safer testing and more efficient iteration in game development workflows.