Key tag added

Assets/Prefabs/Key.prefab

   - component: {fileID: 8825849048276151305}
   m_Layer: 0
   m_Name: Key
-  m_TagString: Untagged
+  m_TagString: Key
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 7024289968253537756}
-  m_LocalRotation: {x: -0.5021949, y: -0.49779552, z: -0.49779546, w: 0.5021948}
+  m_LocalRotation: {x: -0.5021943, y: -0.49779606, z: -0.49779606, w: 0.5021943}
   m_LocalPosition: {x: -2.439844, y: 1.87, z: 0.73052454}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []

Assets/Scenes/Level_00.unity

       propertyPath: m_Name
       value: GameplayCanvas
       objectReference: {fileID: 0}
+    - target: {fileID: 8629169230329452818, guid: 11482ef509975be43bcaf454f9771aed,
+        type: 3}
+      propertyPath: m_KeyIndicator
+      value: 
+      objectReference: {fileID: 122326358}
+--- !u!114 &122326358 stripped
+MonoBehaviour:
+  m_CorrespondingSourceObject: {fileID: 7702242263051669514, guid: 11482ef509975be43bcaf454f9771aed,
+    type: 3}
+  m_PrefabInstance: {fileID: 122326357}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
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+  m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!1 &155182938
 GameObject:
   m_ObjectHideFlags: 0

Assets/Scripts/GameManager.cs

 
     public static int s_MaxAvailableLevel = 4;
 
+    public static int s_ActiveHat;
+
     public void ExitGame()
     {
         s_CurrentLevel = 0;

Assets/Scripts/GameplayUI.cs

 {
     [SerializeField]
     private Button m_ExitButton;
+ 
+    [SerializeField]
+    private Image m_KeyIndicator;
 
     private void OnEnable()
     {

ProjectSettings/TagManager.asset

   tags:
   - Chest
   - Door
+  - Key
   layers:
   - Default
   - TransparentFX