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Seat a cat on a tile in the dark room and every tile it looks at, straight across and up and down, lights up. Furniture blocks its view. Light up every tile to win.

• Cats must never see each other (if they lock eyes, they fight). That's why you can't sit on a lit tile.
• A number on furniture is how many cats sit right next to it (up, down, left, right).
• Not sure about a tile? Press and swipe across it to mark it with an X. Undo and X marks are always free.

When you first start, Cheese walks you through the rules with 4 practice boards.

Tap the yellow hint button and Cheese tells you the next move and why. The first hint in each puzzle is free; after that, watching one ad gives you one hint.

Paws are how many mistakes you can make in one puzzle (3 per puzzle). If you run out, once per puzzle you can watch an ad to keep going with 1 paw.

You can have up to 5 lives, and one refills every 30 minutes on its own. You lose one if you fail a puzzle or leave a puzzle after seating a cat. Practice and levels 1–5 never use lives. When you're out, wait or watch an ad for 1 life (up to 5 times a day).

• Interstitial ads between puzzles: from level 8, only after you clear a puzzle, at most once every 3 puzzles and at least 3 minutes apart. Never right after you fail or restart, and never in your very first session after installing.
• Rewarded ads: only when you tap a lives, continue or hint button.

Not right now.

Turn off tracking for this app in iOS Settings › Privacy & Security › Tracking. In the European Economic Area, the UK and Switzerland you can also change it in the app's Settings › Privacy choices. You'll see the same number of ads, just not personalized ones. See the Privacy Policy for details.

No. Every puzzle is playable without signing in. If you sign in, your stars collected and best level go on the leaderboards.

If you close the sign-in screen, iOS won't show it again for a while. Sign in from iOS Settings › Game Center, then reopen the app.

No. Progress is stored only on that device and is not backed up to the cloud. Deleting the app deletes your progress too, so be careful. Scores on the Game Center leaderboards stay with your Apple Account.

Delete and reinstall the app. This erases all progress, settings and the random analytics ID on the device, and you start from the beginning. To delete analytics data that was already sent, email us.

Go to Settings › Language in the app and pick one of 9 languages.