1. Is this site wordpress? If it is check out this guide for some great optimization tips – WordPress SEO – Search Engine Optimization for your WP Blog
2. Many of your review pages – like this one – G Casino | Casino In UK – seem a little lacking. Since your sidebar is the same on every page, you may have some problems getting these pages indexed as the amount of different content on the page (the review) is very small compared to the amount of similar content (the sidebar). add some screenshots, maybe a list of games, something, anything you can to thicken out those pages.
3. I dont like having /category/ in the url…not a big deal if you leave it.
4. small syntax error in sidebar – intercasino area – document.write(”);