Moovin will not leave you a moments respite , the only rule is simply :
Dont lose the ball !!!
The goal of this game is indeed to avoid the ball to get out of screen.
To do this, just move the device as if you want to follow the ball, this game uses the gyroscope and also the other sensors to follow your movements as accurately as possible.
The ball moves faster with time and changes its color to indicate you its current level.
Hold the device horizontally or vertically depending your preference.
And remember : It is always possible to level up your score !