In the growing ball you have to move a ball around so it does not hit obstacles.
Obstacle types:
rod:this obstacle is a big rod which appears on top of the screen and then goes to the bottom of the screen
rocket:this obstacle flies in from the top right or top left of the screen then waits a bit and quickly flies to the bottom of the screen
you can collect coins in the game for which you can then buy more balls
in the premium version you can buy more balls than in the lite version (including soccerball, fruit, kiwi, wheel, clock and floater) and also your high score gets saved.