This game is (also known as roshambo) is very simple and known to all.
The game played by two people when each player is choosing one of three options on his side of devise (without showing to opponent)
The choice will be covered and the player won't be able to change it.
Not like in original hand played game, in this app, there is no way your opponent will cheat you.
When both players made a choice - hit roll button.

Rock beats scissors
Scissors beats paper
Paper beats rock

Enjoy!