Asteroids are trying to destroy the Earth. Defend the planet with your starship and repel the attack. The difficulty will gradually increase. How long will you last? Game Planet Protector,asteroid shooter,space defense game,HTML5 game,arcade game,shooting game,high score game,defense game,planet defense,starship game,1 player game,crazy game,war game,world war,gun game,online game,mobile game,action game,challenging game