BRICK[bricksmash]SMASH, by Alan Hazelden, is one of those rare games whose title describes it perfectly. It's a bunch of tiny Breakout clones within a Breakout clone. You start with one ball and one life, but you won't be removing any bricks right away. Instead, each time your ball hits a brick, it spawns a tiny ball inside that brick. You can keep those tiny balls alive by keeping your paddle under them. Once all the tiny bricks within the brick are removed, the big brick goes away and you get any surviving balls from inside that brick. Pretty soon you'll have a rainbow! Just make sure you have at least one large ball in play at all times, or you lose.
Gameplay is simple: use the mouse to move the paddle, or select the lower right option on the title screen to switch to [arrows]. BRICK[bricksmash]SMASH is an easy game, but since you're scored on both time and number of large balls you have in play at the end of the game, there's still an element of challenge. Between that, its visual prettiness, and the lovely sounds that happen whenever a ball hits a surface, it's quite a smashing game. Just don't try replicating this with real bricks. Either you'll end up with a concussion, or completely warping reality as we know it, neither of which is good.