Mind Sharpener

This is a memory game in which user will be shown 9 images in a grid layout. The user gets 15 seconds to remember the images, once 15 seconds pass by, the images are flipped over.
The user is then presented with one of the 9 images, and is asked to point out its location. The image is presented elsewhere, perhaps in a random fashion. Once the image is correctly identified, it is flipped back. The current turn is not complete until the user identifies the correct image and the game ends when all 9 images have been flipped back