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