Break the crystal balls by lining up 4 of the same color either up and down or left to right. Use your mouse to drag balls where you need them to be. Work as quickly as you can and keep your stacks away from the top line. Try to drag balls with bonuses like 2x on them into your line for more points. As you progress through each level, things go faster until they get frantic. Can you survive and keep creating Crystal Sets?