fixed: menu navigation, singleton bugs

quit buttons in pause menus are fixed. also the persistent data objects were not deleting themselves if another copy exists, so that's been fixed

Assets/Prefabs/DEBUG/PersistantData/StateController.prefab

@@ -9,7 +9,6 @@ GameObject:
   serializedVersion: 6
   m_Component:
   - component: {fileID: 5026779833035567294}
-  - component: {fileID: 3993188859025174202}
   - component: {fileID: 4111321198473826588}
   - component: {fileID: 5193521544595985828}
   m_Layer: 0
@@ -32,25 +31,8 @@ Transform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 1
+  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!114 &3993188859025174202
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 5592250714439549880}
-  m_Enabled: 0
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: 73653b02e42804d288eaaf881c511225, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  canTrumpet: 1
-  canTambourine: 1
-  canClarinet: 1
-  canCymbal: 1
-  currentState: 0
 --- !u!114 &4111321198473826588
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -69,6 +51,8 @@ MonoBehaviour:
   isPaused: 0
   pauseMenuCanvas: {fileID: 0}
   inDebugMode: 1
+  debugCanvas: {fileID: 0}
+  itemProgression: 0
 --- !u!114 &5193521544595985828
 MonoBehaviour:
   m_ObjectHideFlags: 0

Assets/Scripts/DebugSceneSwitcher.cs

@@ -6,10 +6,18 @@ using TMPro;
 
 public class DebugSceneSwitcher : MonoBehaviour
 {
+    public static DebugSceneSwitcher Instance = null;
+
     public bool showDropdown;
 
     void Awake()
     {
+        if (Instance == null) {
+            Instance = this;
+        } else {
+            Destroy(this.gameObject);
+            return;
+        }
         // Keep the object around when we switch scenes
         DontDestroyOnLoad(this.gameObject);
         CreateDropdownOptions();

Assets/Scripts/SceneController.cs

@@ -18,7 +18,7 @@ public class SceneController : MonoBehaviour
         }
         else
         {
-            Destroy(this);
+            Destroy(this.gameObject);
             return;
         }
         // Make this object stay around when switching scenes
@@ -31,8 +31,8 @@ public class SceneController : MonoBehaviour
         GameObject pauseMenu = GameObject.Find("PauseMenuCanvas");
         if (pauseMenu != null)
         {
-            Button quitButton = GameObject.Find("QuitButton").GetComponent<Button>();
+            // Button quitButton = GameObject.Find("QuitButton").GetComponent<Button>();
-            quitButton.onClick.AddListener(BackToMainMenu);
+            // quitButton.onClick.AddListener(BackToMainMenu);
         }
         if (scene.buildIndex == 0)
         { // if this is the menu

Assets/Scripts/StateController.cs

@@ -46,6 +46,9 @@ public class StateController : MonoBehaviour
         if (Instance == null)
         {
             Instance = this;
+        } else {
+            Destroy(this.gameObject);
+            return;
         }
         DontDestroyOnLoad(this.gameObject);
         SceneManager.sceneLoaded += OnSceneLoaded;
@@ -102,6 +105,8 @@ public class StateController : MonoBehaviour
         {
             Button resumeButton = GameObject.Find("ResumeButton").GetComponent<Button>();
             resumeButton.onClick.AddListener(Unpause);
+            Button quitButton = GameObject.Find("QuitButton").GetComponent<Button>();
+            quitButton.onClick.AddListener(SceneController.Instance.BackToMainMenu);
             TogglePauseMenu(false);
         }
 
@@ -180,8 +185,10 @@ public class StateController : MonoBehaviour
 
     void TogglePauseMenu(bool showPauseMenu)
     {
+        if (pauseMenuCanvas != null) {
             pauseMenuCanvas.SetActive(showPauseMenu);
         }
+    }
 
     public void RespawnPlayer()
     {