Elegant!
You might want to brush up the bouncing algorithm a little. It seems that the balls are checked for collisions in some arbitrary order and respond before the entire array is checked so that, at times, when two balls collide, only one responds as might be expected.
Otherwise, I like it! More minimalistic than simple, I feel, and a really great idea!
Simple but addictive
Clean and simple graphics, fun and addictive gameplay.
one annoying thing though is that I keep accidentally dying, when I move my mouse away from the ball I was expanding and find I accidentally put my mouse over a different ball for half a second, just long enough to get me killed.
If you made it so you held down click (or gave us the control option to hold down click) in addition to hovering over the ball to expand it.
like it
A good example of what a small game of skill should be. The concept is simple - you can pick up this game and understand how it works within 10 seconds without reading any instructions. Its also has fast rounds and an addictive nature. Only thing I think could be improved is facing some new variations of this challenge, rather than just here's the next level, its the same with one more ball.
Brilliant if your bored.
I can see myself coming home switching on the compter and playing this EVERYDAY.
Very creative concept!