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.
You believe that you have spatial perception? Then make you brain work and try to get a picture needed using only a few elements. You suggest that its too simple? Then just try and you will see that it wont be as simple as it seems. Involve your whole family in the game, evolve your spatial perception.