Done?

Assets/Scripts/Level/LevelBuilder.cs

@@ -184,6 +184,25 @@ namespace Level
         }
 
 
+        public bool UnoccupiedTargetExists()
+        {
+            // This can be optimized by creating a mapping to all target points
+            // But I'm not doing that
+            for (int y = 0; y < height; y++)
+            {
+                for (int x = 0; x < width; x++)
+                {
+                    if (layout[y][x].cellData.isTarget && layout[y][x].cellData.cellContent != LayoutCell.LayoutCellData.CellContent.Crate)
+                    {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+
         private void EditCellAt(Vector3 worldPos)
         {
             LayoutCell layoutCell = WorldToLayoutCell(worldPos);