This game starts out great. It is fun, relaxing and simple. When I first started playing I was hooked, and wanted to play a few puzzles everyday. As you progress to more difficult puzzles it becomes necessary to use the flip option, to reverse the direction of the arrow to remove the block. To obtain a flip, you must watch an add. So, to work the more complicated bigger puzzles, you are spending more time watching adds than playing the game. I am giving up on this game because I just don’t want to spend that much time watching adds. The developers could build in some way to get free flips ( other than waiting until you have earned nearly a 1000 points from adds) so that the game could move along quicker. It’s a good fun game, until the add problem comes into play. Too bad. I bet a lot of people stop playing it because of that.