The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Michael Ham:
Narratavius is an app which allows you to play interactive fiction stories, also known as text adventures. Where Narratavius differs, though, is that it was designed from the ground up to run on iOS. Instead of typing commands into an on-screen keyboard, you will simply tap to make decisions.Narratavius supports independent authors, and its stories can be written to fall in any genre.Narratavius currently comes with one story for free, and others may be purchased using in-app purchase. Both the free and paid choices will expand as new versions are created!You can learn all about Narratavius at its website: http://narratavius.com.
* Added feedback button to send feedback to author either through Twitter or Email* Added share button to tell people about Narratavius on Facebook, Twitter, or Email* Added ability to easily review the app from within* Bug fixes