Destroy your first rocket.
Destroy 50 rockets.
Destroy 100 rockets.
Earn 100 Points.
Earn 250 Points.
Earn 500 Points.
Earn 750 Points.
Earn 1000 Points.
Destroy 2 enemies with a single shot.
Without releasing the fire button, defeat 20 enemies.
Defeat 10 rockets in a row without destroying any other enemies.