I'm not familiar with the example you are following. However, you may 
find my adventure game tutorial useful...?

http://www.bitwisemag.com/2/Adventures-In-Ruby
http://www.bitwisemag.com/2/Adventures-In-Ruby-Part-2
http://www.bitwisemag.com/2/Adventures-In-Ruby-Part-3

best wishes
Huw

SapphireSteel Software
Ruby and Rails In Visual Studio
http://www.sapphiresteel.com
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