This is one of a few games that are similar. Its fun but THIS particular game hides the upper shelves so that it can manipulate what it releases as you match. It’s an apps way of using the “psychology” aspect of people needing to finish a level, but will make it difficult until they realize you are about to delete it. If the makers of these game just realize if their game is fun, which this could be, we will continue to play. Well at least they get their money then on the the next game.