Once you have entered the slotmachine, you can always change the denomination of the slot by clicking "+" or "-" in the lower left corner.

When you have selected denomination, choose the number of coins you wish to wager in the next spin by clicking on the BET ONE button once, twice or up to five times. If you choose to bet the maximum amount of coins (5), simply push the BET MAX button. If you press the BET MAX button, the slot machine will spin automatically. If you bet one, two, or three coins, you start the machine by pressing the SPIN button.