A quick mock-up of a potential main-menu. Other ideas would be to fly the camera around when the user clicks on a menu item, like clicking on load would move the view into a building and focus on some floppy disks and computer.
To further it all, a log as the centrepiece, maybe a broken bent fence with 'No Trespassing' on it, more ground detail, extra particles, and insects would complete the scene. An odd compsagnathus roaming around on and off the log catching insects would bring it even more to life.
The vegetation assets are by themodman101.