Added locked barriers and a new ghost enemy

Player/Player.gd

@@ -45,8 +45,17 @@ func add_currency(amount: int) -> void:
     return
 
 
+func has_item(item: String) -> bool:
+    return $Inventory.contains(item)
+
+
 func add_item(item: String) -> void:
-    print('%s added to inventory' % [item])
+    $Inventory.add(item)
+    return
+
+
+func remove_item(item: String) -> void:
+    $Inventory.remove(item)
     return