This seems obvious to most, but to get back to the main page you press the close button in the corner (X). You could put navigation on this page i suppose, if you wanted... UPDATE: don't worry, I've done it for you anyway.

1. This is where the text goes
2. Close and back to top buttons now have tooltips to more effectively explain what they are.
3. Font acessibility improved - for those of you that don't have Verdana (like some old Macs, I believe).
4. The back to top button works properly, with no editing needed. It uses "anchors" this time.