Play in Chrome Browser recommended.Microsoft Edge Browser seems to be slow.Or Download free on Apple iOS, Android and Microsoft storeHumanity is under threat, proceed and engage the onslaught. Your ship will automatically fire and you can control the speed and direction of your ship, either clockwise or anti clockwise. Be sure to make use of the power Ups to help your cause.
Rotate around the ring, employing a strategy to take out the on coming aliens as efficiently as possible.Mouse button "Left" or "z" switches ships rotation.Mouse button "Right" or "x" Speeds ship up.