Heartbleed is a virus that has recently effected about 2/3 of the whole internet. This is a growing problem, please be aware. Nitrome, however, are clear of the virus, as stated on this test: http://filippo.io/Heartbleed/#www.nitrome.com You can also use that website to see if any of your popular websites are infected.
I would highly suggest that you should change your passwords on any important websites such as online banking. And remember to stay safe!