Protect your cities from the attack of the enemy missiles enemis.
At the beginning of the play, you have 5 cities. The game is over when the last city explodes.
To destroy the enemis missiles, you can fire your own missiles starting from the two bunkers located on the right and left of the screen.
Be carefull, the bunkers also can be destroyed.
With each new level, a certain number of ammunition are given to each bunker. With the end of the level, the remaining ammunition are kept for the next level. If you calculate your blow well, you can destroy the missiles enemis by using few ammunition.