Starting at the bottom of the board, drag the colored dots to the slots on the game board. If you'd like to change a color in a slot, drag a new color to the slot.
When you are happy with your guess, hit submit to see how close you are to the right answer. A small red dot mean you have a correct color in the correct position. A white dot means you have a correct color in the wrong position. You have 8 tries to crack the code.