Click on the clock to begin your waiting session. Oh, and don't think about browsing the internet while you wait. If you move your mouse off of the clock, you lose. Also, don't use your phone or 3DS or whatever. Every 10-60 seconds you'll have a 5 second period to click on the clock, and if you miss this period, you lose. Lot easier in full screen. The clock is bigger, so if you bump your mouse, you still have a chance.
The most boring game ever! All you do is wait. And wait. And wait. And wait. And sometimes click so I can be sure you're not cheating. And wait. And wait. And wait. As those valuable seconds of life tick away, and you're sitting here waiting. And waiting. And waiting. And waiting... Unless you came here to see the cool clock, which I guess is fine.