Well executed game, looks and plays great! But the whole concept is utterly annoying. Admittedly I'm just not fast enough. But, can't they just sit the f*ck DOWN!!! ;-) But no, not for me, this type of game. Too annoying that they keep moving.
Perhaps to make it easier you can let a color stay still as soon as you gathered all of the same color in the right area? Or perhaps make them move only when you touch hem with the mouse cursor?
