Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Complete all tasks	Destroy more than 35 copters.
Complete fifth task	Burn all weed in less than 270 seconds.
Complete first task	Fly in less than 60 seconds.
Complete forth task	Destroy more than 60 barrels.
Complete second task	Destroy more than 40 barrels.
Complete seventh task	Destroy the tower.
Complete sixth task	Destroy more than 60 barrels.
Complete third task	Survive more than 200 seconds.