Enter a number in the question box between 10 and 100. If its correct the green light will flash. If it's incorrect the red light will flash. There are 10 guesses in total. If your guess is too high the bottom arrow will flash, which means you should guess lower. If your guess is too low the top arrow will flash, which means you should guess lower.
It took me a while and there may be some problems but I just think it's soooooooooooooooooooooooooooooooooooooooo epic!!!!!!!!!