update

Assets/Editors/LevelDecorator.cs

@@ -22,6 +22,7 @@
 // 4. Adjust the sliders and click "Apply" or "Randomize Everything".
 // ===============================================================================
 
+#if UNITY_EDITOR
 using UnityEditor;
 using UnityEngine;
 
@@ -186,4 +187,5 @@ namespace Editor
             Debug.Log($"<color=#FF8800><b>[LevelDecorator]</b></color> Scale randomized for {Selection.transforms.Length} objects.");
         }
     }
-}
+}
+#endif