littleDefender is our last hope against unknown alien invasion. There are a variety of alien spaceship from Star Gate, this will be the main goal we want to destroy.
Be more careful to use our weapons. We can get some loot from the wreckage of the enemy ship, some of which will be useful for us to defend the tougher enemies. At the same time, there is a strong unidentified object, we call it the Helper. The Helper will assist us to complete our work. Seek the Helper when we need.
Good Luck.