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 LMA Consulting:
Create your own and original wallpaper images for your iPad, iPod Touch and iPhone.Simply use your fingers to create amazing drawings.Tap the screen and move your finger to see how the drawing evolves.Pinch two fingers on the screen to stretch or tighten up the current image. Double tap to randomly generate a new drawing.You may also adopt a more scientific approach and manipulate the controls (sliders and switches) to refine your drawing.Bookmark your results and get instant access to them via the favorites manager. You can save up to 20 different drawings.Use the drawing animator to see how any parameter affects your images.Finally, save your results in the camera roll of your iPad. You can use your images to create amazing wallpaper images for your iPod Touch, iPad and iPhone devices.Have fun and stay tuned as new versions with extended drawing options will be released soon.