Earth has picked up a signal from beyond the galactic core. The signal was a question, and you carry our answer: past the planets, through a wormhole, and onto the photon ring of Sagittarius A*.
On a phone, swipe to move one square at a time. Tap the screen or the Fire button to shoot. Settings has two other ways to steer: a tap-a-square nav pad, and drag-to-steer.
You fly in a 3 × 3 grid: three lanes and three levels. Your ship stays where you put it, and the small grid under your score shows your position.
Your tank drains as you fly, so keep grabbing fuel cells. Run dry and the engine flames out: reach a cell within 3 seconds to reignite. One hit ends the run.
Raiders show up later in a run. Dodge their red targeting beam, or shoot them down.
Loop 2 begins when you continue.
Each message you deliver decodes another piece of the signal Earth received from beyond the galactic core.
You know the moves. Real runs speed up as you go, drain your tank, and send raiders after you further out.