Code Crackr is a game where you guess the secret code to stop the countdown.
On refreshing the page, the countdown will start over with a fresh code. To change the code, double click each digit and type in a new digit. To check the digits, click the yellow 'check code' button.
When you click 'check code', note the set of lights below each digit. They give you clues as follows:
The game is won when all four lights below the digits are green and the counter is stopped at a non-zero value. If you've played the game "Mastermind" before, the strategy is similar. Enjoy!
Get the source code and image files.