Wallpaper sites are extremely hard to optimize for the search engines. From my first look, it would look like you have repeated keywords too much (Google will see this as spamming), and you have the keyword twice in the title (Gogle hates this). I would start by maybe creating a description closer to the top of the page, and use your main site keyword in <h1></h1> tags somewhere near the top of the page. Personally, the amount of keywords on that page looks quite spammy. If you want to generate more income from your ad at the bottom of the page, move it somewhere that people can see it as well. People dont pay well for ads that far down the screen. Maybe try using a leaderboard and inserting it above the wallpaper content on your wordpress main index file in that template. Overall though, and I dont mean to be harsh here, but keywords are not used very well at all on this site. You will need to learn how to impliment keywords a bit better if you want to rank better. This goes for your home page, and all deeper links.
when i first open the link, my first thought is that the website looks pretty uncomplicated and clean. I like the soft blue and white contrast in the background. The white allows the Google ads to not be too intrusive and it blends in well. The pictures are very prevalent and immediately catch the eye of the viewer. A very good website to get soccer pictures from. As to how much it's worth in $$$, I can't say simply because I'm don't know how to appraise websites. I'd pay a couple hundred bucks for it? Hope that helps, -Johnson.