Every time you complete a certain number of normal or Special category levels, you’ll be awarded a Sticker. Each Sticker is part of a set, and once the set is completed, you’ll receive Gems!

When you have an available Sticker to add to a set, the Sticker Book icon located in the Main Menu will display a red exclamation point.

Game modes such as Question of the Day, Quiz Show, and other events do not award Stickers.