relaxing like the last guy said
overal this was a pretty good game and probely beats my "Retro Pong" but in the future you may want to add some space between the cubes and the walls so the ball can travel in all directions and maybe a splash screen when you lose instead of some text down at the bottem of the page. And also like the last guy said maybe some powerups.
example code not exactly acurate.
ball.onEnterFrame = function(){
ball.hitTest(cube){
powerup._x = #;
powerup._y = #;
powerup._y -= 5;
} // end hit Test
paddle.hitTest(powerup){
// paddle or ball stats increase or deacress
}
actual code may be different just trying to help ;)