Help Ninja Pig save the world from an alien invasion! Collect shurikens to shoot as you run through 10 levels to finally confront the boss. Improve your star rating on each level by completing it in one go, shooting some enemies and still having ammunition left over. Ninja Pig,mobile game,action game,save the world,alien invasion,shurikens,shuriken,level 10,star rating,stealth,action,strategy,mobile gaming,adventure game,fighting aliens,save earth,gameplay,boss battle,shuriken game,animal game