It's pretty hard to criticise it when there is only one page lol
There are a few errors that you might want to take a look at
http://validator.w3.org/check?verbos....sillygolf.net
http://jigsaw.w3.org/css-validator/v....sillygolf.net
You also haven't got a H1 tag, this can be bad for
SEO
About the background, is it meant to look like grass?
If it's not then it looks good, if it is though i would change it for a better one
Hope this helps
Craig