Very well made
Great game concept, it's original without being too complex which is an achievement to be sure. I'm not big on these kinds of puzzle game but the idea of competition and the tactical style gameplay (mainly through the chain reaction aspect) have now got me hooked.
Visually it's nice and crisp, simple and effective, i like the animations of the little particles in the boxes. It's also a nice touch that the quarks follow your mouse pointer.
The sound is good, the music loops a lot but its not annoying, which again is an achievement (but i guess you can't go wrong with music from fight club). The victory music is ace as well, makes you even more glad you won :D
To improve, there's not much you can do to the gameplay itself IMO. You may want to tart up the visuals and make it feel a bit more polished ( this IS a site for animation too ;) ) but apart from that this is a solid game. Good Job!