Guest users can view the top 25 ranking and also create an account.
Registered users can login, view their profile, delete their account, and play the game. User profile contains info about: user register date and game stats (wins, losses, total games, total points, win/loss ratio). The registered user has to win at least one game to be displayed on the ranking list (and to be within the top 25).
Playing the game - the user has 8 tries to guess a randomly generated 4-digit number. On each try he/she will receive info about how many bulls and cows he/she managed to guess. A cow is a number that is present in the answer. A bull is a number that is present in the answer and also that is at the correct position. If the user wins he will get 3 points added to his score.