Defend The Earth-from asteroid

This game's goal is to defend the earth from asteroid.
Before asteroid go to the earth nearly, destroy asteroid by touching asteroid.
If asteroid arrives at the earth, life will be reduced by two (big asteroid) or one (small asteroid).
If all the five lives are reduced, game will be over.
Your touch is only weapon to destroy asteroid.
Before asteroid arrives at the earth, destroy asteroid by touching the asteroid quickly.
Let's destroy all the asteroids then defend the earth completely.
Compare your score with other's in global leaderboard.