Rules are simple. Once you click start, the ball is being thrown up in the air. Ever since that moment, your task is to hit it with the ball in order to keep it in the air as long as possible. In case you miss it, the ball drops and you loose a life. There are three attempts in one round.
About the game
There are dozens of similar games, but I think this one stands out a little bit. It's very colorful, has nice graphics and very appealing music theme. Just hitting the ball would have been uninteresting. Instead, you have a lot of different 'flying' objects which represent obstacles for which you get points if you manage to hit them. You get different points for hitting a plane, rocket, superhero, satellite, planet or a bird. Occasionally you will encounter even an alien ship. There are two power ups: life support and a boost. If you pick latter, the bat grows enormously bigger and spans across the whole screen, so during the boost period you practically can't miss the ball. It is good when the ball flies higher, but it's more important to estimate the point where it will fall.