This may be one of the most laughably bad games I've ever played on this site. Especially one to have as high a rating as this one has.
The rate at which new balls are added sometimes seems to be at random. The fact that the new waves of balls are added AS I SHOOT is immensely frustrating (ie. they are not added after the last miss, they are added as the next ball is shot). If that's not the intent, then you sure as hell should fix it. The lack of chain reactions of any kind is very annoying.
But perhaps the most hilarious part is how if you just rapidly shoot balls into the area, the game never ends until you stop clicking. I was able to get over 2400 balls on screen at once. How my browser never managed to crash is beyond me. Also, that gave me a score of 400,000+.
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