For now, you cannot register over the web.

To create an account:
1. Start the game as if you were going to play normally.
2. For the username, put in your desired username followed by and underscore and either M for male or F for female.
    Example: myusername_M
3. For the password, just enter your desired password.
4. If the game logs you in, everything worked fine!

Remember: You must remove the _M or _F the next time you log in.