Natas 0

http://natas0.natas.labs.overthewire.org/
username: natas0, password: natas0

This first level was pretty easy. The page says "You can find the password for the next level on this page", and if you view the source, you see "<!--The password for natas1 is gtVrDuiDfck831PqWsLEZy5gyDz1clto -->"

Done!