At the moment the simulator status page is somewhat crippled due to configuration mishaps
The good news is that the simulator is still up and running and you can SSH to it by ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 firstname.lastname@example.org -p 10022 and password seymour.
You can also use the brand new in-browser SSH client.
Please note: the initial key-exchange process on the SSH server is very slow. Allow a few minutes for the password prompt to appear.