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 Byrd Apps:
The game is a casual third-person 3D game made for everyone to play. Green Utopia is a group of cities that only use green energy sources. You are responsible for finding build locations to setup and build the energy sources, and you need to find the resources needed to build the energy source. You can also pay for the resource without finding all the resources needed to build, but you will only meet the levels goal requirement. You will have problems that arise through out the game that you will have to manage and choose a solution. There are three types of energy sources including water, solar, and wind power. The Resources are carbon rocks, iron rocks, silicon rocks, and wood. Each level will have different needs for energy sources and different terrains. Be on the look-out for diamonds along the way for extra cash. The score is compiled of the total time to beat the level plus the number of resources left over after the builds plus the percentage of completion of the level.