You will be given a random number between 19-120 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. The value of each crystal is hidden from you until you click on it.

You win the game by matching your total score to the random number. You lose the game if your total score goes above the random number.

Every time you win or lose, the game will automatically restart with a new random number and new values for each crystal.