Click Easy or Hard mode. I recommend easy for the first time. It will give you a number. On easy, it will show for 1 and a half seconds, and on hard it shows for 2 seconds. If you are on easy, it will be a 4 digit number and on hard it will be a 7 digit number. After the number hides, you have to type in the exact number it was!
Challenge: Beat the current Hard High Score! Tell me in the comments if you completed the challenge.