It's just not a challenging game. It's very basic. You start to repeat levels which isn't fun. There are also way too many ads! Developers are being way too greedy. You can only play 2 levels before getting an ad. Additionally, a lot of the other progress in the game is ad controlled. It is kind of fun, which is why I'm giving 2 stars, but it needs A LOT of improvement. (and less ads).