fix

Assets/Scripts/menu/MainMenu.cs

@@ -8,4 +8,9 @@ public class MainMenu : MonoBehaviour
     public void PlayGame() {
         SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
     }
+
+    public void QuitGame() {
+        Debug.Log("Application is quitting!!");
+        Application.Quit();
+    }
 }