Defend the space carrier with a turret by gunning down as many enemy spaceships as possible. Get additional help by sending out carrier fighters of your own.
This is a pretty cool bullet hell shooter which uses the Stage3D technology. (It defaults to 30 fps but if you got a nice graphics card, go to Options / Graphics and turn up a notch to 60 fps for smoother gameplay.
Take a control of huge space vessel called Radiant Star. Protect your vessel from all out attack by enemies. Buy weapons and upgrades to resist enemy attacks.