I assume you didn't do the above. Virality, press, etc... are often not reliable sources of traffic to build a sustainable group of users in the early stages. At this point, you should go back and find that core group to improve the MVP with and worry about growth once you've worked out all the initial bugs and features users actually want.
Obviously take my advice with a grain of salt as I have no idea what your idea is and just how far you got and this is very general advice (on iPhone and didn't go to your link). You need to make sure people even wants your product