If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Destroy enemies with your weapons and abilities and survive as long as you can.
WASD – Move ship.
Space – Shoot lazer.
Q – Launch Rocket (Energy Cost : 12).
F – Activates energy shield (Energy Cost : 30).
E – Activates slow time ability (Energy Cost : 50).
P – Pause / Resume.