You control two paddles with your hands. Your objective is to clear each level of cubes.
Start by reaching up with your hand. A ball will drop down. You can use either hand, and you can even reach up at different places to drop the ball exactly where you want it!

To launch the ball, hit it with a paddle. Push forward to launch the ball straight ahead, or swing sideways or upwards to aim the ball.
Your goal is to clear out all of the cubes in each level by hitting them with a ball, or using any other means of destroying them. After launching the ball, keep it in play by hitting it with a paddle as it comes back to you (the ball gets a green glow when it's a good time to hit it).

If you miss, you will lose a ball. After losing 5 balls, the level ends and you'll have to try again.
Remember to aim carefully! If you want the ball to bounce straight ahead, keep the paddle still. To guide the ball towards a certain direction, swing your hand as you hit the ball. Big swings work better than short movements.
At times
Boom Time will trigger, and normal balls are replaced with fireballs.
Fireballs can be aimed just like normal balls, but they'll seek out cubes in the general direction of your hit, and will explode on contact! Remember, to aim straight ahead, slowly move a paddle behind the ball, then push forward sharply.

You can play for as long as you like, but beating the silver or gold time of a level will award you with a medal.