Set TIMER minutes (1-5, default 2) and select which digit for your hint (default digit 3), then press START to play. You'll see a 6 row game board with the selected digit hint on the first row. You'll have 5 chances to guess the 5-digit-random-number on the next 5 rows within the time selected. The guesses cannot start with zero or have repeated digits. Enter each guess using keypad, followed by Enter key. Your guesses will be displayed back to you with each digit color coded as follows: GRAY, digit not in number; YELLOW, digit in number but wrong position; GREEN, digit in number and correct position. Play ends when: You guess the number; Use all 5 guesses; Time runs out. You'll be able to repeat play.