Fill the screen up with your circles without being hit by the balls, Huehuehue?
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A game I played on Whirled back in the day. It was pretty much identical as far as I remember, except much more polished. Twas very fun.
Oh so many. This was my first game in Java, as opposed to Processing, and that alone made enough problems to make any grown man cry. But I powered on through, just to reach logic problems. Balls weren't bouncing properly, circles were teleporting, and even still the percentage-o-meter is just a total guesstimation, because for some reason it wasn't working when I used proper values.
I don't think so; not in its current state at least. I have a few ideas to jazz it up a bit (coloured balls that do things like exploding after 3 bounces or pushing circles) but I don't think I'll have the time or the will to implement them any time soon.
EDIT: I've noticed that I forgot to remove a little test-dot in the top left corner of the screen. Oh well. It can stay there. Anywho, here's a GIF of me playing and losing the game: