They let you do-overs or see your mistakes and don't earn the points.Each time you click on the cats or kittens they "meow" as to say hear we are for roll call in the game. They are hiding in black and white drawings. It is too easy to find them. If you can't see them they do have a magnifying glass in the bottom left hand corner. Plus time limits and they will count them above the screen. A cute game. I have earned 5 hearts? I'm on level 6? It's a keeper