Select simple nandroid restore.
Do you see your backup there?
Don't, this is completely fixable, I promise.
Tap the power button once to return back to the menu with the basic and advanced backup/restore options. Scroll down to the advanced restore and see if your backup is there. Again, don't freak out, we are just doing the super easy stuff now to get your phone working again. If it doesn't work, we have several other options to use. Your phone will work again, I promise.
How many backups have you made? 5? If so you can pick any of them.