Ride the hoverboard across shifting worlds — ocean, lava flats and dust plains rotate every few seconds. JUMP (tap twice for a double) clears geysers, volcanoes and boulders. FIRE shoots from wherever your board is, so jump to line up flyers. Insects and monsters go down when hit; hard terrain bounces your shot straight back — dodge it, then let it fly into the leviathan chasing you. Grab boosters for shields, rapid fire, heat vents and thrust bursts. Your board's HEAT climbs every second and only firing vents it — let the core overheat and it costs you. Threading a gap by a hair drops you into slow motion for a bonus. Three hits ends the ride.