Use W, A, S, D to move the rocket
SPACE to shoot lasers (0.5s cooldown)
J to launch explosive rockets (8s cooldown)
SHIFT to activate shield (30s cooldown)
Avoid asteroids! 3 hits = Game Over
New planets every 500 points!
Laser upgrades every 1000 points!
Boss battles every 2000 points!
ENTER to restart when game over