The goal of the game is to remove pairs of cards from the tableau.
These cards can be any combination of colors, but must have the same value
(eg: a 3 of hearts and a 3 of spades), and must be located adjacent
to each other in a row, column or diagonal.

Click on the first card of a pair to select it: a red border will be drawn
around the card. Clicking on a matching card will then remove them both from
the tableau; you'll hear a beep if the move isn't allowed.

If you need to deselect the active card, click again over it.

After removing all possible pairs, the tableau must be consolidated,
which means that the remaining cards in the tableau must be "backed up"
(moved to the left, then up, keeping the original order) to fill in the
blank spaces created by the removed pairs.

Cards from the deck are then dealt into the newly-created spaces and
the process of removing pairs begins again.

The tableau can be consolidated and re-dealt as many times as necessary.
To perform this operation, just click on the deck in the bottom right
corner of the window.

The game is won when the entire deck has been removed, or lost when no
more moves can be made.
