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 Wired Developments:
WHAT IS ROCKETEER? An extreme physics puzzler on the iPad / iPhone and iPod Touch! Launch your Rocketeers out into the depths of the unknown to help navigate them through the harsh terrain that lies ahead! See your Rocketeers blast around planets using small, medium and large push and pull gravitational forces. Bounce, duck, dodge, spin and teleport your Rocketeers into navigating their way through hazardous levels while you try to avoid blowing them to smithereens in this extreme physics puzzler! FEATURES (Full Version) * Extreme physics puzzler * Strategically launch Rocketeers into space to get them home safely * Many challenging puzzle objects to help guide your Rocketeers * Many hazards your Rocketeers must avoid * Challenging addictive gamplay * Easy to learn, hard to master * 83 levels to launch into! * Progressive gameplay unlocking more and more objects to use and avoid * Stunning 2D and 3D graphics