First Impression: (As soon as it loaded my instant thought=) Is this site done?
The colors left no room for contrast. For instance, when looking at it, you can't pick the dark color, or the light color. It's all in the middle. That's why half the people like it, and half don't. IT really depends on who likes contrast and who doesn't.
I myself, would never play on that site because of the design being layed out the way it is and the background being useless techniques that aren't really needed to improve the design.
Perhaps make a simple design, with contrasting but complimenting colors, and a good idea of positioning the ad's no matter what the design to get a big payout. (Perhaps have a fake pic of a game, and have the ads next to it matching the other game titles and descriptions).
PS: This is all in a happy thought of mine, I am really not trying to be mean and say it has to be changed, just the way I write.