Swipe up and down to move along the corridor. Swipe across a cat to swat it if its colour doesn't match the bowl it's heading for. Tap an empty bowl to refill it. Wrong food or a hangry cat is a strike, and three strikes ends the game.

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.