for p1, use wasd and mouse to shoot. whenever the enemy ship is about to shoot, you have a half second to move before he fires a shot in your direction. can glitch into walls, if so, restart game. HAVE FUN!!!
for p2, use arrows to move, and 8 and 2 on the numpad to aim up and down, with 0 to shoot. also, when the enemies die, you can just fly around space and practice shooting.