ok, here is the deal, you downloaded the client, that is all. the client is simply just a set of pics that are on the website to decrease loading time each time you click and refresh a page or whatever.
the game itself is on the website, its not a 1st person shooter, you dont fly around and kill people, its text-based. all of the game is played on your browser, simply log in, and click on things, to know what clicking on what thing does, go to the manaul, and read the Walkthrough, as well as the rest of the manual.