Press any button to start. You’ll see a slot machine interface with three reels. Press the mic button to insert credits, which will be used to spin the slot machine.

Your total amount of credits are shown on the bottom right of the screen. Hit the Up directional key to spin the slots and the down directional key to mute the sound effects. Each spin costs three credits. 

You can press the mic button to add more credits to your account every three minutes. Each time you score, credits will be added to your total credit amount, which you can use for more spins.