Your object is outlined in green, while the opponent's is outlined in red. There are no controls, you just type rock, paper, or scissors when it asks you to.
If you make a typo while typing, it will recognize as it not being rock, paper, or scissors and ask again. This is all luck, there is a 1/3 chance for any of the options the opponent chooses. Custom Difficulty Slider 1 - very easy, 2/3 chance to win, 2/9 chance to tie, 1/9 chance to lose 2 - easy, 1/2 chance to win, 5/18 chance to tie, 2/9 chance to lose 3 - normal, 1/3 chance for all 4 - hard, 2/9 chance to win, 5/18 chance to tie, 1/2 chance to lose 5 - very hard, 1/9 chance to win, 2/9 chance to tie, 2/3 chance to lose