Find a pair for a cat

Find a pair for a cat is an interesting game with cats (more than 100 images), developing memory and logic, where you need to open cards (2 each time) and find pairs of cats (identical pictures). If a pair is found, then both cards leave the playing field, while there is a special card (a lonely cat), which never has a pair.
There is a button to change the difficulty of the level (English letters), a button to skip a level (a circular arrow), a button to go to a new level (an arrow with a door), when the current one is successfully completed, and a field with the current number of openings of pairs of cards that did not match.