With Line Tennis, you control the ball by drawing a line; the ball bounces off the line. Draw at an angle to change the direction of the ball, if you get the angle right, you will hit the target. If not the ball keeps bouncing and you can try again.
You must hit all 3 targets in 90 seconds. If you complete the level; you will be awarded Gold, Silver or Bronze depending on how quickly you finished the level.
Avoid the grenades that randomly appear in some levels.