A random number will be produced by the magic crystal at the start of the game. There are 4 helper crystals. By clicking on the blue, yellow, magenta & orange crystals, one by one, you will add points to your total. You win the game by matching your total score to the magic number. You lose the game if your total score goes above the magic number. The value of each crystal is unknown until you click on it. When each new round starts, the values of the 4 helper crystals will change, as will the magic number.