Game rules are very simple... You should
clear the game field of tiles. To do so you just click on the tiles
by pairs (if you click the second tile in a pair, both tiles are removed).
To be selected, a tile should be free, i.e. there should be no tile on
it and it should have at least one side free (no tile on the left or no
tile on the right). The tiles must have identical pictures on them except
if they belong to the same group (in this case the pictures can be
different).
For more information about tile groups see tiles description.
