The BET ONE button allows you to increase the number of coin being bet one at a time. When the maximum number of coins is reached, the count re-starts from one. You will have to click on the SPIN button to spin the reels.
The BET MAX button allows you bet the maximum number coins allowed by the game, and starts the reels spinning.
The SPIN button allows you to start the game.
The STOP SPIN button allows you to stop the spinning reels.
ROYAL CARIBBEAN is a single pay-line slot machine, which means that payouts occur on the center pay-line only. For every coin that you put in you increase your payout. When the reels stop spinning the symbol combinations along the center pay-line are checked. You get paid out for any winning combination falling on the pay-line.
The winnings paid out on ROYAL CARIBBEAN are dependent on the symbol combination that lands on the pay-line, the value of the coin bet and the number of coins bet. The total of your winnings is the number of coins won times the value of the coin played.