I like the idea, but the game pace is a bit slow... it's a shame more balls don't pop up after you loose them either, since the slowest one is really impossible to miss, and so the game suddenly transforms to a waaay too slow idea. Also, the green/red color combo isn't too slick, the score text is a bit dark for the background, and you can click the 'point blocks' instead of having the ball target them. It's a good start, just needs more variation!
-cd-