Match all the pairs of cards by turning them over 1 at a time taking care to select them in the order of pairs only. Win by selecting all pairs and having all cards turned over at the same time. If you make a mistake all cards will be reset and you will have to try again. Good luck getting the sun to shine!
Was going to make a standard pairs game, then made a mistake in the logic which turned out to modify the gameplay in a preferable way :-D