Take control over a huge space vessel, the drone carrier 'Radiant Star'. Buy upgrades to resist enemy attack.
Mouse to aim and fire the main gun.
[A] and [D] or arrow keys to scroll the view.
Spacebar to access the build&upgrades screen.
[C] to center the view, [H] to toggle the hit-points overlay, [J] to toggle the HUD visibility, [P] to pause, [Q] to toggle quality, [M] to toggle sound.
Don't forget to build drones to repair your vessel.