add Puzzle A variants

Assets/Desert/Runtime/Emission.cs

@@ -1,4 +1,5 @@
-using UnityEngine;
+using NaughtyAttributes;
+using UnityEngine;
 
 namespace EscapeRoomEngine.Desert.Runtime
 {
@@ -8,6 +9,7 @@ namespace EscapeRoomEngine.Desert.Runtime
         
         internal bool active;
         [ColorUsage(false, true)] public Color color;
+        [BoxGroup("Internal")] [Required] public MeshRenderer emissionRenderer;
         
         private bool _previousActive;
         private Color _previousColor;
@@ -15,7 +17,7 @@ namespace EscapeRoomEngine.Desert.Runtime
 
         private void Awake()
         {
-            _material = GetComponent<Renderer>().material;
+            _material = emissionRenderer.material;
         }
 
         private void Start()