In this action title, players must pilot their ship through 60 waves of frenzied action, collecting crystals and evading the ever present, out-to-get-you Nasties. These unique baddies spawn from portals on each side of the screen; firing the main gun or deploying a smart bomb quickly vaporizes every Nasty on the screen. Players must work quickly to grab all the crystals, opening the gateway that completes each level. Players can also gather up the goodies in each wave to grab bonus points, extra smart bombs and even an occasional mega-crystal for massive points.