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 Zippz Software:
Underwater Memory Match is a classic memory match game for kids!This addicting mind puzzle is designed to be fun and educational!Underwater Memory Match is a universal iPhone/iPad app. Take it with you on your iPhone and enjoy the larger screen on the iPad.3 Difficulty Levels:-Easy: 6 cards (3 pairs)-Medium: 12 cards (6 pairs)-Hard: 20 cards (10 pairs)*HD RETINA GRAPHICS for iPhone 4!!!The lite version lets you play the same 10 puzzles at each difficulty level over and over again. The full version does not have this restriction.