To slide up and down,left and right on touch screen to operate the spaceship to fly up and down, left and right.
Click on the screen to slow down.
According line sexy to control spaceship accelerated,slow down , stop, can not happen overnight.
To get away from all directions, at different speeds, but inertia, fixed direction, fixed speed drifting meteorite.
When 3 astros appeared and all are rescued, namely clearance.
More to the back, wafting meteorite will become increasingly long time, the numbers are more and more.
Each stage has a different outer space situational.