This game has no settings for the player to select, therefore no specific rules apply. Shark Treasure's scoring system is different than usual. There are two kinds of score: your current score (shown in the higher part of the screen on the left, it's the amount of gold you currently own) and your peak score (on the right, this is not related to the previous games you played but it's the maximum amount of gold you managed to earn during the game you're playing). When a shark eats you, you don't lose a life (you don't have lives) but your current score decreases (while your displayed peak score remains intact, of course). If your current score goes below zero, it's game over. Hence the only way to compete here is by comparing the peak scores reached by different players.