Hello 

protector of the earth, what brings you there?

Your task is to defend against strong giant planets, 

to defend yourself as a warrior.

Don't know how? Okay, I'll help you

There is an exchange in the game, you can exchange with an alien by clicking on the alien.

To shoot, you need to press the left mouse button.

For the ability you need to press the right mouse button.

Well, defender, take care of yourself, but I have to go.