If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The cats photographer profession looks easy outwardly, but actually every cat breed requires its own approach, its own breed vision. You need to work fast. First you should photo all cats from the list. Then you should find all the cats in the children room and photo them. And at third levels you should find the differences between two same photos.
This game is played with mouse only.