Wondering what those little faces smiling back at you from beneath your basket are? They're keys that will unlock collections or start challenges!
How do I use keys in the game?
Green turtle keys unlock all collections, gold keys unlock challenges. If a key isn't green or gold, it's color corresponds to the color rarity of the collection it will unlock—for example, a white key unlocks a white collection, a red key unlocks a red collection, and so on.
You can earn keys to unlock new collections when you complete old ones (by clicking the green checkmark on your completed collections). When you level up, you'll win turtle keys. These keys are unique; they can open any regular collection of any color rarity. You may also purchase a turtle key at any time by clicking the white shaded "Add Series" option at the bottom of the page (just below your basket).
Why does my key have a number next to it?
If you see a red circle with a number on your key, that indicates that you have more than one key available to you. The number will tell you exactly how many keys you have.