It's amazing at helping your hand to eye coordination and reflexes. Not only that, it's so simple it's fun. However I understand "ads" are how the publishers capitalize, but they need to reconsider putting them at the bottom. Hardly are you ever allowed to hit the retry button, so instead you have to back all the way out into the stage lists. As well the ads cover up stage six. So where the major problem is; if your lucky enough to see stage six, then you better capitalize on the opportunity, because you'll only be able to play it once before the ads cover it up again.