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 In A Day Development:
Enjoy the great new word game Wordventure (formerly known as RadLibs)! It's lots of fun for kids and adults alike. Kids can learn about parts of speech and have a wonderful time doing it! This is how it works: First, choose a Wordventure! story. Pick Nouns, Verbs, Adjectives, Adverbs, etc., save your completed Wordventure and then read YOUR hilarious story! You can play alone or with friends to share all of the great times! 3 Wordventures are included for Free and tons of new Wordventures are available for download. New Wordventures are added over time so check back to join in the new fun!