Player 0 - W = Accelerate, S = Decelerate, A = Climb, B = Dive, E = Shoot
Player 1 - I = Accelerate, K = Decelerate, J = Climb, L = Dive, U = Shoot
Other Keys - P = Pause, O = Debug Info, 1 - AirAttack Skin, 2 - Bip Skin, 3 - Not done yet!
Includes collision detection code from indiegamr.com