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 ZAP design:
Wow, this skeleton really feels the music deep down in its bones! Choose music from your collection and watch the bones come to life.A unique Music Interpretation Engine listens to your music and brings the bones to life. A complex physics engine adds cool life-like --er-- realistic movement as the skeleton gyrates.When using a gyroscope-enabled device, you can be part of the creative process by tilting to control the skeleton's dancing style from hyperactive to a mellow groove, otherwise you can control the level of intensity manually.'Bones' loves all DRM-free music, but, sadly, refuses to groove to restricted DRM locked music. (iTunes has offered DRM-free tunes since 2009.)You'll love watching 'Bones' twirl, whirl, pirouette, boogie, mosh and gyrate to disco, rock, punk, reggae, hip-hop, electronic, even classical music. Anything with a beat!