The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Jesse Haskins:
Rainbow Tile is a simple game. The objective of the game is to score as many tiles as you can while trying to win the the race against time. The two modes are:Classic: Every 30 tiles you are given another 10 secondsTime Trial: 10 seconds to score as many tiles as possible!