Since the game was a tech demo originally created by Creative heroes aka Richard and Sander our glorious webmasters, hopefully getting it back should be relatively easy, though I'm afraid I don't have a copy archived.
it was more an extended demo than a game, a shame that more wasn't done with it particularly since it used the unity engine and was I think the first accessible game created with unity.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)