that's just how the live cd works. you can type root as the user or guest i think and the password is the same.
If you want to test it, logon as guest, if you want to install, you logon as root.
There is a program you can run that will run you through a guided and very simple install.
The system is debian based and comes with a very nice array of standard programs. It also comes fully loaded with browser media plugins and multimedia codecs, which are normally a bit trying for the novice user.
I'd say give it a go, it's a wonderful desktop system that is ready for those who want functionality out of the box.
Good luck and enjoy.