heya, right now that extra standalone level is broken yeah, but we've just set up a new server for our game. I'll probably be able to upload it on there in a few days, will reply to you here when i have!
Alrighty! here it is:
http://rhythmdr.com/RDSteinway/index.html
bonus: http://rhythmdr.com/RDKanye/index.html
let me know if you have any problems and thanks for the kind comments!