The usability test plan summarizes testing done on the game Once Legendary. Testing found issues with controls not matching the menu, enemies doing little damage, character falling through platforms, and awkward sword controls. A questionnaire was used to identify casual versus hardcore gamers. Testing involved thinking aloud and answering post-level questions. Initial feedback identified issues like a lack of checkpoint indicators and enemies being ignorable. Data collected included times, deaths and errors encountered. The plan aims to help the developers improve the game based on a casual player perspective.