You can pump up your reflexes on a game with a quite modest interface, like the one that is offered to you in Pop Blue. The task is to destroy only the blue bubbles that rise from below. You can ignore the red ones, clicking only on the color you need. If red and blue are too close and there is a danger of hitting the wrong color, wait until they fly apart. Just make sure that the bubbles do not prick on sharp spikes, a number of which are located at the top and bottom. If this happens, the Pop Blue game will end. Also will be if you miss the blue ball.