I started playing this game few days ago. When I started I thought that this game is very interesting and challenging. In starting I used to play this game for vry long hours but slowly and slowly I got bored by the game as the game is never ending and missions are very less also no updates are introduced to make game more interesting. I was surprised that no new updates were introduced to the game as every game maker introduces updates to make game more interesting and popular.
In 3 days I completed the whole game and got bored after that.
The game is no more challenging and interesting anymore after completing all the missions.
I think the developers should introduce more updates to the game to make it popular like clash of clans.
I will suggest people whi are interesting in very challenging game not to install this game as you will get bored very quickly.
Instead of this install some other game.