Earn experience points for destroying enemy ships and asteroids. Use that experience to upgrade your ship. You can upgrade your max health, regeneration speed, reload speed, ship speed, shot damage, and weapon speed. Fly around the universe and try to stay alive, see how many rounds of enemy ships you can defend. Using your laser you can destroy enemy ships. Once you have shot a ship you'll have to gain 5 times the experience compared to an asteroid. http://darkwalllke.com/game/space-2/