Instuction: First, you have to pick how many color you want to play by click on those color buttons. If you see a white circle around the button, it means you chose that color. Then, you have to click on the word "Start" to start the game. Therefore, if you want the game much challenge, then you can active all the color at the same time. If the button you put is on the right position, you will see a small "Black" pin at the side. If the button you put is not on the right position, but the answer contain that button, you will see a small "White" pin at the side. So, if you see there is no small pin at the side, that mean you didn't get another button correctly.
If you have any problem, please send me a mail.