Should I keep updating this iPhone app? Or is it complete crap?

This was my first attempt at writing an iPhone app last September. It is now free and gets on average 150 downloads per week since 1 January 2011.

I have not updated the app since last October as I am not making any money from it. So now I am trying to figure out if I should update it - i.e. rewamp the interface and recompile to the most recent iOS.

Links:

http://itunes.apple.com/us/app/words-puzzle-1000/id395147842?mt=8

http://www.visiblestorm.com/

I seem to be leaning towards dumping it as I do not have any monetary incentive to continue working on it (i.e. I have to eat and do something more rewarding right now.)

This is my first post here. I am also finishing school next week (OOSD in Calgary) and I am looking for an internship/job right now. Some things I know: HTML, CSS, PHP, JavaScript, C#.NET, VB.NET, ASP.NET, C++, Objective C, MySQL, Oracle, Java, JSP, Pearl. Linux, Windows, Mac OS. Apache.