You get 8 guesses to figure out the hidden combination at the end of the board. Fill colored marbles from the bottom into the lowest row of slots. After, hit the red button on the bottom right of the board. A black marble means you got a color right and it is in the right spot (or order). A white marble means that you selected a correct color marble but it is in the wrong spot. If you didnt get any marbles after hitting the red button it means that none of the colors you used in your guess are in the hidden combination. A color can be used more then once in a combination, so watch out!