Algaen
.... added a "to: email" in the telnet messages, to no avail. ......
maybe use some HTML mailto: ?

it has to be /hack/level5/level5.php
Yes but it don't have to be hulla-ballo.com/hack/level5/level5.php, I suppose it could be http://127.0.0.1/hack/level5/level5.php, but I ain't sure, I'm no hacker or anything lol.