Your title says “Learn the Slots”
You will need to have a Slot Tips page, a Slot Myths Page, and a page telling the visitor about 3 reel slots, 5 reel slots, bonus slots, progressive slots, and so forth. I would go so far as to have a slot of the month rather than a casino of the month. You will probably get far more qualified visitors to the casino this way. If you send a player to Golden Tiger (example) to play Major Millions, you have a decent chance that he/she went there for the right reasons.
Casino reviews are important but don’t lose the slot focus. If your site is about slots then give your visitor great info about slots. If well written, an article can arouse curiosity and that is a great plus for the visitor to click the download button.
The free games are great but they won’t give you the conversions you desire. Treat them as a learning or fun tool and even to build a mailing list of players. I have 2 sites that do well in Yahoo and Google for free games and the conversions suck. The sites that I get hits for the slots names e.g. Mermaids Millions, Tombraider, Aztecs Treasure, and so forth have far better conversion rates.
You artwork is pretty and the overall appeal isn’t bad at all. I personally prefer to use a clean and rounded font like Verdana or Arial but thats a personal choice.
A good site format that is easy to navigate really does help. I also like the minimal approach to banners. My players mainly click text links they find at the end of a paragraph about the game or the casino. Very few click banners.
Never forget that over 50% of your visitors are probably going to be female visitors. A nice raunchy site might appeal to a few visitors but a clean, bright and interesting site will surely win the prize.
Only my opinions, certainly not facts 