Pass and play draft style your hand of cards until all cards have been played X the number of rounds.
Select a card from your hand to play. This can either be played as the card's function or as food.
If you wish to play a card as food, look at the number in the first circle with the cutlery, this shows you how much it can allow you to grow.
If you play a card as its function, it is placed in a position matching the number in the circle (the height). This will do nothing for you unless your Kraken has reached this height via feeding. "L" cards have no height and are obtained immediately without need for growth.
The boats have a default height of 4 and are taken in a first come first served basis, with the highest value boat given to the first player to reach them.
End of Round
After all cards are played, the round ends.
Your Kraken automatically collects anything within reach, anything beyond its reach is lost.
End of Game
Look at the number in the shield of the cards you have obtained, these are the points you have made.