Look at the timer on the top of the screen and survive until the enemy run out of time. Use your primary canon to shoot the enemy and find a shelter to hide from the enormous waves of enemy pods!
You are locked in a world, where there is no exit and enemies spawn along the map. One single touch of a hostile pod takes one life, but you have not that many of them. Survive during the hunt and eliminate all hostile pods near you. They have different power and durability, so you should choose the right position for your defence.