compare tiles properly

includes/script.js

@@ -293,7 +293,7 @@ $(document).ready(function() {
                         // even if we want to "always create new tiles" we still don't want to create duplicates
                         // THIS SEEMS TO NOT BE WORKING
                         var bestMatch = _.find(bitsyData.tiles, function(tile) {
-                            return tile.bitmap === pseudoTile;
+                            return _.isEqual(tile.bitmap, pseudoTile);
                         });
 
                         if (bestMatch) {