In Go Pirate! you're a pirate on a quest for Blackbeard’s treasure. You start your adventure as a cabin boy then, as you progress with your brushing, you gain experience and earn rank as a sailor, helmsman, gunner, and so on, until you’re a captain!
Your progress through the ranks depends on how many times you brush your teeth. For instance, you’ll become a sailor after 10 brushing sessions, and a ship’s master after 100 sessions, etc.