I've played this game for years, passed over 2800 levels but at now the point of uninstalling. Levels are so obviously weighted against the player clearing the board that even the fish don't clear obstacles and ensure that you're stuck playing the same game for days/weeks. The chance to gain (just) 1 extra move by watching ridiculously long ads are few and far between. You may as well just charge for the game and have done with it as free play has become far too frustrating.