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 Crescent Flare:
The Marblenauts return to the App Store in a Lite version! A puzzle game like no other.Guide your Marblenauts to their transporters to help them escape. Use break and crate tools to solve the levels. Are you the puzzle expert they need?Features:- Supports iPhone, iPod and iPad in one universal build- Each puzzle provides a unique challenge- Use different tools- Nice unlockables and a cool special prize!- Handmade pixel art, play on the iPad or a device with a retina display for high-definition goodness- Undo multiple moves, there is no penalty for making mistakesThe game contains excellent sound effects and music tracks by Mike Weiser:http://www.mikeweisermusic.com