Flexball is one of the best breakout-games which are currently avaiable for download.
There’re not only a mass of powerups (like longer paddle, cometball, fireball, bigball, ...) there’re also good effects like explosion... and the sum of this gives a very good arcade-feeling.
The music is kind of ok, but time after time it may let your nuts go crazy ;D. The game itself features nearly over 50 leves, but if you wish you can download additional-levels from the homepage - or you do it yourself with the included leveleditor.
If you don’t know breakout until now:
In breakout-games you have to shoot your ball against some blocks in each level. If the ball hits one of the blocks - the block will disappear (later you may have some special blocks and/or more balls ... so more difficulty). A level is mostly finished if you "killed" all blocks in this level.