So, a Queen and an Ace make 13 and a 5 and an 8 is another way to get 13.
The tricky part is addressing the cards. The top card in the stack is addressed as 1. The cards in the second row are 2 and 3. The cards in the third row are 4, 5, and 6. The cards in the fourth row are 7, 8, 9, and A. The fifth row contains: B, C, D, E, and F. This is what is known as a hexadecimal addressing system.
Additionally you can select a card from the stack of cards by pressing S and you can go to the next card in the stack by pressing N. You can reset the game by pressing R, but you only want to do this when you run out of moves since your score is decreased by ten points when you reset.
You must accumulate 100 points to win the game. This will take at least 5 resets.