Farmers vs Aliens

Aliens have attacked your farm! Grab a cannon and go – protect the cow!
You will need a strategy for this game! Shoot from cannons and destroy aliens. Survive the attack and protect the cow. But the aliens are very cunning and they themselves build cunning strategies to steal the cow.
You will have to seriously arm yourself, as the alien invaders are very hard to stop! Arrange dynamic fights and destroy all aliens.