Look at the first 400 vertical pixels of your home page. “above the fold”
you have a single link to a casino. not a great way to convert.
Your header is taking up 135 pixels value space as an image, just for looks.
the “How to Play” looks good, but i’d link the word “download” to the download URL for your best converting casino.
i’m available for a consulting engagement if you would like more ideas, but i’ll bet one or two more people will give you some other ideas too.