You will be given a random number at the start of the game.
By clicking on one of the four crystals below, a specific amount of points will be added 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 u til you click on it.
Each time when the game starts, the game will change the values of each crystal.