It's a slot machine, Einstien - you push the SPIN button and hope you win.
When the buttons with the little arrows on 'em start blinking, you can use them to adjust the reels up and down to try and score. You can make as many adjustments as the number in the upper left corner says you can, but as soon as a winning combination comes up, you're done.
The buttons below those are HOLD buttons - if they start blinking, you can click one or more of them to hold that reel into the next spin.
The next button is the SPIN button - that's the one you press to spin the reels, and it costs 5 points each time you do.
If you see any more buttons besides these, you're probably drunk or hallucinating. Consult your physician immediately.