You will be given a random number at the start of the game.
Each crystal represents a specific amount of points. By clicking any of the 4 crystals, you add that amount of points to your score.
To win the game, match your score to the random number. If you go above the random number, you lose the game.
The value of each crystal is not shown. To find out how many points each crystal is worth, you must click on it first.
Each time the game begins, the values of each crystal changes.