fix : error in the menu and rename files

Assets/Code/Scripts/UI/MainMenuUI.cs

@@ -31,6 +31,19 @@ public class RetroMainMenuUI : MonoBehaviour
 
         BuildMenu();
         EnsureEventSystem();
+
+        UnityEngine.SceneManagement.SceneManager.sceneLoaded += OnSceneLoaded;
+    }
+
+    private void OnDestroy()
+    {
+        UnityEngine.SceneManagement.SceneManager.sceneLoaded -= OnSceneLoaded;
+    }
+
+    private void OnSceneLoaded(UnityEngine.SceneManagement.Scene scene, UnityEngine.SceneManagement.LoadSceneMode mode)
+    {
+        // Check again when the scene finishes loading to remove any baked-in duplicate EventSystems
+        EnsureEventSystem();
     }
 
     private void LateUpdate()
@@ -316,8 +329,7 @@ public class RetroMainMenuUI : MonoBehaviour
 
     private static void EnsureEventSystem()
     {
-        EventSystem[] allEventSystems = Object.FindObjectsByType<EventSystem>(FindObjectsSortMode.None);
-
+        EventSystem[] allEventSystems = Object.FindObjectsByType<EventSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None);
         EventSystem eventSystem;
         if (allEventSystems.Length == 0)
         {

Assets/Code/Scripts/UI/MainMenuUI.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 297533e46238b814989fcd5d46cf8927

Assets/Code/Scripts/UI/RetroMainMenuUI.cs.meta

@@ -1,2 +0,0 @@
-fileFormatVersion: 2
-guid: fa612753289203548aa7ed790c42847e