Numble is a simple number game where you need to guess a 5 digit number in 5 attempts. 
On the first attempt, you will get advised if your digit is correct, too high or too low.
On subsequent attempts, if the secret number contains one of the digits in your number, that number will display an orange background. If the secret number contains one of the digits in your guessed number and that digit is in the same place as the one in the secret number, the background turns green.
You can practice as many times as you like, and when you are ready, you can play the daily game which presents the same number to everyone playing the game. You only have one game day game each day and your results are shared across all of your devices. After completing a daily game, you can share your results with others.