That coin sound you're hearing at work today is Google's Super Mario Bros. tribute

Google has introduced an Easter egg to observe the 30th anniversary of the launch of Super Mario Bros. Search for the game and a Question Block is displayed beside the game's thumbnail information on the right side of the page.

First, click it. Click it some more. Click it past 100 times and you'll hear the extra life sound. That's it.

Sorry, no mini-game in the Google doodle, like the search engine did for Pac-Man, Dr. Who, or even the Pony Express.

Microsoft also paid its own tribute, though it bills the observance as "8-Bit Day." Go to microsoft.com, punch in the good ol' Konami code (just up, up, down, down, left, right, left, right, B and A — no start) and Microsoft's unofficial Ninja Cat mascot appears, riding a Tyrannosaurus rex. The dino poops out quarters, which, if you drag to a coin slot on the page, will take you to search results (Bing, of course) for arcade classics, not necessarily Super Mario Bros.

In other Nintendo news today, the company named a new president, its company's fifth, to take over leadership since Satoru Iwata's death two months ago. Tatsumi Kimishima, the president of Nintendo of America before Reggie Fils-Aime, will take over effective Wednesday.