Drag anywhere on the screen to steer. Eat yarn to grow: each new colour goes right behind your head and becomes your bite colour. Bite any part of a rival that matches your bite colour to steal that whole block of colour. Bonks and getting chomped lose you segments. Be the longest cat when the timer runs out to reach the next level. Tap a power-up on the How to play screen to see what it does.

Open the main menu and tap Restore purchases. Make sure you're signed in to the App Store with the same Apple Account you bought it with.

Install the game, then tap Restore purchases on the main menu. It's free.

Check your iPhone isn't on silent (the switch or Action button on the side) and the volume is up. Music and sound effects can also be toggled with the buttons in the game.

Make sure you're signed in to Game Center in Settings › Game Center. Scores are sent when a game ends, and the leaderboard shows your best.

Tap Privacy choices on the main menu (shown in the UK and EU), or go to Settings › Privacy & Security › Tracking. See the privacy policy for details.

Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.