Simple, yet addicting
It's a lot more fun than I would have expected, but I would recommend replacing the music with something more complex and less repetitive..
The only real issue that I had were that some of the colors were very difficult for me to discern the difference of(which is idea, I suppose), but the issue was exacerbated by my monitor. Looking at my screen at the wrong angle, I cannot tell the difference between pink(#FFC8CB) and silver(#C0C0C0) for example.