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 Muso Labs Ltd:
"The cutest dragon in all the land is Duke. He needs your help searching the caves for hidden gems so he can unlock his friends Del and Dave. But be careful Don't clash with the caves Flap to survive in the day and at night Dodge the fearsome fireballs and deadly evil dragons that guard the gems.* * * * * * Tap the screen to fly.* Avoid rocks, fireballs and deadly dragons to survive.* Find gems to unlock more dragons.* Guide your dragons through day and night worlds.* Start by flying Duke* If you're good, fly Del, he's pretty tough.* Try Dave if you think you can handle him!* Fly your Dragons further than your friends can. "