Greetings. You are the hero(es) of Lomadia, this land. A friend of yours has put together an obstacle course, but it has been taken over by the evildoer Lepharsi. He does not care whether you live or die. However, if you make it through this course alive, he will reward you greatly.
Unpack it and move the folder into:
WINDOWS: %appdata% > .minecraft > saves
MAC: [user] > library > application support > minecraft > saves