To keep track of your high scores, tap the columns icon in the top left corner of the main screen.
To get access to a leaderboard, you need to be signed in to Game Center on your iOS device:
1. Open Settings on your device.
2. Scroll to Game Center, then tap it.
3. If Game Center isn't on, turn it on.
4. Enter your Apple ID and your password.
5. Your account screen will appear, where you can change your nickname, personalize your profile picture, and add your friends.
