Pictures and memory

A memory game with 4, 8, 16 or 20 cards. Players can change the difficulty level.
The cards are laid face down on the screen. They hide different pairs of pictures and the player must find each pair.
To select a card simply tap on it. When two identical cards are selected they disappear. If they are not,identical, they go back face down.
To change the difficulty level tap on the stars (top right of the screen)