I looked at your site and saw a few things that can be changed to make your site picked up more by search engines and also help people with disabilities ( 2 for one!) You do not have any alt commands for your images. It would only take a few minutes to add in a description to your images that makes it clear what they are to people who can't see your images and for search engines. I know adding a description to every image doesn't sound like it would help but in reality it does. I do not add a description to an image if it is a background that is the only time I don't follow normal procedures of adding descriptions.
How does this help people who can't see your images and search engines? Easy you just write in what the image represents (or does) like if it was an image of a bear drinking coca-cola the description would probably be "if a bear enjoys a nice cold drink of coca-cola; your sure too!" I personally don't like coca-cola but I thought that was a good description idea that shows with words what the image is and the search engine would probably pick up the words "coca-cola" along with "nice cold drink". I hope this helps