This game is just like stone,paper,scissors which we used to play in our childhood.But we want someone to play with us. This time ur competitor is computer itself. In this game if you choose snake over water then snake wins because snake drinks that water. If you choose gun over snake then gun wins because gun shoots snake and so on.
As you can see in the above screenshoot. Comp chooses randomly chooses water and you chooses gun over it. As gun sinks in the water so it gives you a message of you loose.