The Galaxy is being invaded by aliens called Wallrocks. Humanity has had to build interplanetary ships to combat them. Wallrocks do not have many more ships than humans, but there is a feature that makes them very dangerous, they never rest.
You have been designated as Captain to lead all humanity and prevent enemies from reaching Earth. You will have enough ships and ammunition to attack them, but you must choose the best strategy to defeat them. Sometimes it will be better to attack a planet only, other times you will have to divide your forces and hope to achieve numerical superiority.
When you have at least 3 human units (green) you can send them to conquer a neutral planet (gray) or a planet occupied by the Wallrocks (red)
Each time there is a battle or a planetary conquest, the units of one and another side will be subtracted, and the unit that has more units after the confrontation, will be the winner, then that battle will be won or a planet will be invaded.
Doing double tap on any human planet you can increase the production of units or you can increase the defenses of the planet, choose what suits you best at each moment, but remember that you can only do it if you have at least 5 units.
Conquer each Planetary System and so you can go to the next. Do not let the Wallrocks win the war.
Lucky Captain.
