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 Mac winsoft:
Now with Stunning High Definition (HD) graphics and nice animations let your children learn "Promptitude" - Doodle Colors: BE WARNED: Doodle Colors is Insanely Addictive! How to play: On each screen you are given a word and a number of buttons to choose from, all what you have to do is to select the COLOR of the word, not the word! As you move to advanced levels, it becomes more fun and more challenging. Features: Glorious and Stunning HD graphics Nice animations Beautiful sounds effect. Different levels to make it more enjoyable and fun