Merge pull request '解决再做一份跳转错误' (#6) from junmao_branch into develop

src/view/QuizPanel.java

@@ -87,7 +87,7 @@ public class QuizPanel extends JPanel {
         add(retry);
         add(exit);
 
-        retry.addActionListener(e -> controller.showLoginPanel());
+        retry.addActionListener(e -> controller.showDifficultySelectionPanel());
         exit.addActionListener(e -> System.exit(0));
 
         revalidate();