The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Best social fun mobile phone apps:
The tractors have invaded the city! All of the highways have turned into TRACTOR RACETRACKS! Jump into your favorite tractor and speed race you way through town with TRACTOR JUMPING, POWER BOOTS and MULTIPLAYER MADNESS!FEATURES: Ultimate Tractor Speed Racing. INCREDIBLE graphics and music Choose your own AWESOME tractor! FANTASTIC music that will make you dance! Simple controls for maximum racing pleasure Hours of awesome gameplay Race your friends with multiplayer!