-You will be given a random number at the start of the game.
-There are four crystals below. By clicking on a crystal you will add a specific amount of points to your total score.
-You win the game by matching your total score to random number, you lose the game if your total score goes above the random number.
-The value of each crystal is hidden from you until you click on it.
-Each time when the game starts, the game will change the values of each crystal