The nametag is only used to communicate with others in Web-Worldz via chat and a nametag on your avatar.
No password is required.
If you do not choose a name, you will be seen as "Guest".
Web-Worldz.com is a 3D website and provides movement controls for you to walk around and explore. You can change your device type at anytime using the link in the top bar.
(3)Some Smart Devices...uhm...aren't so smart. If you have enough memory you will be able to explore and use the IM/GROUP Chat Options; but ironically, the voice option (offered only in certain worlds) does not yet work on most phones.