Try MoonNavis Lite for Free!

MoonNavis Lite is the little brother to MoonNavis, but this younger sibling, still features amazing (retina display optimized) graphics, engaging sound effects and integration with the OpenFeint social gaming platform. MoonNavis Lite is a lunar lander simulation game that puts you at the controls of a rapidly descending lunar landing module. Hone your landing skills with MoonNavis Lite – AND – when you’re ready – upgrade to the full verison.