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 Moido Games Ltd.:
Speed. Memory. Reactions. Benchmark yourself with ReaXXor! ReaXXor LITE is the free version of the ultimate testing suite for human performance. Test yourself and challenge your friends in two addictive game modes: 1) SPEED: Tap the colors in the order they light up. Try to keep up as the speed relentlessly accelerates. 2) MEMORY: Memorize the sequence of colors and then repeat it. The sequence gets longer after each turn. FEATURES - Universal app (iPhone & iPad) - High resolution graphics for iPhone 4 Retina display - Playable in portrait or landscape orientation - Drum pad with two drum sets----** FULL VERSION FEATURES ** Get the full version and enjoy these additional features: - Reaxxion mode to test your reaction time- Game Center and OpenFeint leaderboards and achievements - "Hardcore" difficulty setting for Speed and Memory modes