A random number has been generated as your targeted sum total, and each of the crystals has been assigned a random value.
By clicking on the image of a crystal you will add that specific amount to your score, your goal is to reach the target total.
Win the game by adding the values of each crystal to make your total score match the randomly generated number.
If your total score goes above the random number you lose. Each time the game starts, the values of the crystals change.