Start a journey across a neverending universe filled with obstacles and Dangerous Stuff.
Manouvre your ship around those Scary Red Dots, either by simply rotating your device, or even by spinning on your toes. Whatever floats your (space) boat.
Try not to remain without fuel, and explore as far as you can reach. Infinity awaits you in every direction: are your piloting skills good enough to get to it?
Of course, youre in a rush, so your ship is always accellerating – it wouldnt be much of a challenge if you were simply out for a stroll, would it? :)