Tap on the screen to launch anti ICBM missile. Counter-missile explodes only when it reaches the target - at the point where You tapped.
Standard turret has unlimited ammo. You can expand your turret and increase missile speed, explosion range and loading time.
You can buy additional weapons like satellite, sonic missiles, anti radiation umbrellas...
The game will over when radiation level exceed 100%.

You cannot win the game... consider this message...