A bit like duck hunt, but with gulls.
Aim your shotgun target reticule by swiping up, down, left or right. Shoot using the big red fire button at lower corner of the screen. After eight shots your gun needs to be reloaded and that is done by touching the last empty shotgun cartridge slot.
You have three minutes to clear the sky and you will get one point for each seagull you shoot down. Extra time can be won by shooting the balloons that sometimes float around.
It's easy. Have fun.