Bounce off the edge of the screen 3 times in a level.
Unlock your first shiny new plane.
Shoot 3 enemy planes in a row without getting hit.
Shoot down your first enemy plane.
Complete every level in Classic Mode with 3 or more lives left.
Play a single wave in Survival Mode without getting hit.
Shoot 20 enemy planes in a row without getting hit.
Complete any level in Classic Mode without losing a life
Unlock every plane in the game.
Complete every level in Classic Mode.
