Welcome to the Cray simulator
There are two ways to access the simulator. The first is through your regular SSH client:
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -oHostKeyAlgorithms=+ssh-dss -X crayusr@cray.modularcircuits.com -p 10022
The other is to use the in-browser SSH client
In both cases the user name is crayusr and the password is seymour
Please note: the initial key-exchange process on the SSH server is very slow. Allow several minutes for the password prompt to appear.
The benefit of the first approach is that you can use X-forwarding and enjoy the graphical applications as well as the command line ones. If you have the patience, that is. Try 'xclock'
If you are interested in the background of the project, you can read up on it on my blog.
The source code of the project can be found on GitHub.
You can also check out the documentation library I've collected over the years.
Finally, some nice person uploaded a couple of OS images to Archive.org which should allow you to replicate the simulator at home: