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 Mind Leak:
Lite version limitation-only 2 machines available in lite version-only 6 levels available in lite versionFull Version features-Play with four different machines with different abilities.-Play with sci-fi flying machine called Helicar.-30 levels with many different structures and obstacles.-Play Endurance Levels in the night.-Each machine crashes in its own style.-Use accelerometer to create great stunts.-Compare your score with your friends by using OpenFient.-Local and global score.-New machines,levels and obstacles in next updates.