Fly — drag on the left side of the screen (Easy stick), or use ◀ ▶ to turn and ▲ to fly forward. Fly off one edge and you come back on the other.
Pop — tap POP to send sparkles. A big rock breaks into two smaller rocks, those break into pebbles, and pebbles turn into stardust.
Collect stardust ✦ — fly close and it comes to you. Every 40 stardust gives you a new shield.
Shields — in Classic and Take turns, bumping a rock costs a shield. When they are all gone, the flight ends. Calm and Count have no shields to lose.
Comets sometimes zoom past. Pop one for a big bonus!
Keyboard: arrows or W A D to fly, Space to pop, P to pause. Finish (at the bottom) ends a flight and shows your score. No ads, no sign-up, nothing leaves your device.