Try to guess the secret code by using a sequence of colored marbles. Fill in a row and click the first clue dot in the row to be given feedback that will allow you to close in on the correct sequence. A black dot on the right indicates that you have a marble in the correct place with the correct color, whereas a white dot tells you that you have the color right, but in the wrong spot.
This version has a customizable board and keeps track of your average number of guesses before you crack the code. A help file in the context menu teaches new users how to play. They keyboard is enabled for quick color changes.