Drag your finger up and down, left and right across the screen to move the ball. But make sure you keep between the Double Yellow Lines.
You can place your finger anywhere on the screen and swipe in any direction to make the ball move. If you hit one or other of the yellow lines, you lose.
A simple looking game, but very tricky to master. The further you get the harder it becomes.
Scores recorded via game center, so see if you can travel further than your friends.
Click Here to download Double Yellow Lines from iTunes.