Make an iPhone/iPod app for this game. I can`t imagine making the interface would be too difficult. Nowadays, games like this are much more competitive in that area. People would be much more attracted to it if they could play it on their iPhone on the go wherever they are. Sure its accessible on the internet, but people won`t be aware of it unless its an app; the category/search features would make it easy to find for anyone interested in this kind of game to find. There are a number of games already on the iPhone similar to this, albeit less in depth and not as interesting, that are successful for this kind of game.
The amount of work it would take to make it would be comparatively little compared to the profit that could earned from it. This kind of game is really ideal for the iPhone.
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