The goal of the game is to get the opponent all wet before you end up all wet.
When the duel begins, the opponent will draw his water pistol. When he does, you must hit the splash button before he splashes you. You will have a split second to tap the splash button as fast and as many times as you can before you get splashed. If you splash your opponent he will get all wet and you will face your next dueling opponent. If you hit the splash button before he draws or not quick enough after he draws then you will get splashed and the game will reset.
There is a total of 4 duels to play. Good luck and don't get splashed!