Ask HN: Do I need a better icon for my application?

For a while now I've been developing a small freeware Android application, and recently I've launched a commercial version of it in the Android Market. And while the users seem to be generally very happy with the application, I can't help but to constantly think about the launcher icon, which is not very beautiful:

http://imgur.com/7cEx4.png

Could my poor icon actually be hurting the sales? It surely doesn't create a very good first impression when a user finds the app in the Market, does it?