There are options for different themes and levels of difficulty. For the easy level there will be 6 pictures (3 repeated). For medium, 12 pictures (6 repeated). For hard, 16 pictures (8 repeated). Additionally, there will be a 5-second timer. As soon as you press start, the pictures will flip for 5 seconds to memorize them, then you must match pairs. Scroll to the bottom of the game to see all the images used.