Octopus starship has launched a ferociously, relentless attack on the Thoradus starship, first by hacking the Thoradus weapons system, sending the most lethal cannon gun into an uncontrollable state and then launching a series of deadly circular weapons against the Thoradus electromagnetic defence.
The cannon gun however remains powerful and usable. Take hold of this gun and destroy the circular rings before they destroy the electromagnetic barrier protecting the Thoradus ship.