Worked on the excaliburjs/Excalibur repository, focusing on resolving a rendering issue in the Excalibird tutorial. Addressed a bug related to ground height by correcting the reference to game.screen during ground initialization, which improved the accuracy of the drawing surface for tutorial users. Updated project documentation to clarify the changes and ensure alignment with the new implementation. Utilized JavaScript for both the bug fix and documentation updates, applying skills in game development and technical writing. The work enhanced the reliability of the tutorial experience and provided clearer guidance for users, reflecting a targeted and detail-oriented approach to project maintenance.