[XenConcept] Quiz Manager 2.2.0

I've been following this add-on for a long time and finally had the chance to test it today. I tested the add-on on its official site at http://demo.xen-concept.com/ and encountered some issues.

I created a quiz with 2 questions, and even though I selected the correct answers, it still marked them as incorrect. This suggests that the add-on might need further development to resolve this issue.

Additionally, I have a personal suggestion: It could be more engaging if a leaderboard were added to the add-on, where the rankings of successful quiz participants could be displayed in the sidebar. Also, adding a time limit to quizzes and fixing the issues mentioned above could make this add-on much more successful.