Press The Left And Right Arrows To Turn, Press The Up Arrow To Go Forward, and Press Space To Shoot. For Player Two, Press A Or D To turn, W to Move Forward, And F to shoot, each player has 10 lives, whenever the play again button is pressed, the game will get increasingly harder. Have Fun!
I took the original code from Airplane Battle, and made an exponentially harder version. New skins and abilities for the "planes" were added. The red spaceship shoots lots of lasers fast, while blue shoots double lasers more slowly. Enemies spawn much faster in this version.