Space Invasion

Shortly before today's events, humans have been warned about a possible attack from space, uncertain space objects. It's too late to make any conclusions, as the attack is underway. Lead the line of defense of humanity, and not let their land grab, in the clutches of the insidious alien aliens from another galaxy. Use powerful spaceship combat, attack the target first, do not wait for their attacks. What would win this unequal war, follow the instructions.