When started, the game presents a board with square cells. Every cell hides an image that can be seen by clicking on the cell, but this disappears quickly. You must remember where the images are, because they come in pairs. If you quickly click on two cells that hide the same picture, the cells will "flip over" and the pictures will stay visible. The objective of the game is to turn over all the pairs of matching images in a very short time.

git clone git://github.com/dzenanr/educ_memory_game.git

After some thinking we came up with the following model, which describes the data handled by the application. In our game, we have a number of pictures, which could belong to a Catalog. For example, a travel catalog with a collection of photos from our trips or something similar. Furthermore, we have a collection of cells and each cell is hiding a picture. Also, we have a structure...