Yeah, this will end any productivity you had planned for the rest of the day! Click the picture below to play SUPER MARIO BROS!
Man, many a night in my youth was spent playing my Nintendo. My wife and I were actually talking this weekend about how we'd rather play these games that a lot of the newer ones out right now. I really likes Super Mario 3.
Anyways, back to the matter at hand. If you're looking for a way to kill some of your day, check out the link on the picture above. The only problem I really had with it was the slow reaction time, but that's to be expected with a game like this run over the internet.