More Website Updates

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I've made more updates to the site.
1. Transparent window background is now applied to all page contents rather than just the logo in the Home page and Games. I think it looks nicer like this.
2. Links in the navigation bar are now centered.
3. The navigation bar itself is now a bit smaller.
4. If your screen is small, you can now scroll through the descriptions in the Games page. Before this change, it would look all messed up, especially in mobile devices.
There has also been some internal changes, but that's not worth discussing.