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 Blooming Sunday:
Need some help in Doodle Devil? Included in this app is a full cheat list of 100+ Doodle Devil elements. Disclaimer:- This is an unofficial guide to Doodle Devil. We are not affiliated with the developer of Doodle Devil in any manner. All trademark and copyright concerning Doodle Devil are the property of the actual developer. - In creating this unofficial guide to Doodle Devil, we assert the "fair use" doctrine pursuant to United States copyright law and the equivalent in other jurisdictions. If you believe that there has been a contravention of your proprietary rights then contact us.