2 stars for gameplay. This game pushes you to spend $ for gems. In arena mode, you will fight against other players. You will face birds that are lower power than yours. You get absolutely DESTROYED in total damage. Levels that take more than 1 bird to clear will get cleared by someone with 1 bird left, and then get strikes on the next 2 levels. You were winning by a couple Mill, and then get blown out by 10M from someone using 1 bird that is less power than yours. It's disgusting!