A few days ago I wrote a bit about Saw, the video game. It was about the update or 'deluxe' version as Pedro calls it. I was surprised how such thing can make your game popular all of a sudden. I monitor that by the number of hits the game gets in walkthrough visits.
The original version has been on my site from February and was visited once or twice a day. But since the update has been released, it has been around 80 average. The moral: keep working on your game and keep improving. One day you'll be famous!