It seems some of you have problems using the game. Some windows do not open or are pretty slow to be displayed. The problem is not the game itself but your browser.

Below a comparison graph showing performance amongst major browsers. Safari and Firefox are the best performing ones.

I recommend using Mozilla Firefox 3.

Download it here:
http://www.mozilla.org/firefox

You may give a try to Google Chrome also (http://www.google.com/chrome).
I did not try it myself but I do believe some users are using it and are satisfied.

I use Google Chrome and everything loads good and fast

I was using IE8 which was dire, Google Chrome is like lightning.