If you hit the button, the countdown will reset to 30 minutes. If the timer hits 0 before anyone else hits the button, you win. You need to pay at least 0.001 ETH (~$1 USD) to use the button. This helps prevent spam clicks. I take a 20% cut of click costs to help with website operating costs.
You need to download a browser extension called MetaMask. Then, transfer a few dollars of ETH into the wallet. After that, you should be able to click the button above.
I made this using Ethereum Smart Contracts. You can view the source code here. I messed up the old contract, it's a black hole. Please DO NOT use it. I refunded anyone who did. This one works.