The concept of the game is good I really like the idea of it and it's perfect if you were looking to pass time, however the downside of this is the constant spam of ads. You get an ad every 1-2 levels and everytime you fail and since the levels are easy that's pretty much 1 ad every min or so and they're always the long ads. I get more ad time then I do in game time and £3.49 to remove ads is a complete scam. It's not worth buying it when the game is short and repetitive.