From the back of the box:
Zed has risen from the grave in pieces, help him gather all of his parts before his time passes away.
From the rulebook:
Place Zed on the rotating base. Choose the level of difficulty by turning Zed and the rotating base to the different marked positions (Easy, Intermediate and Difficult settings). When Zed starts rotating you have to hurry and put all of his pieces into their proper place before time runs out. You win if you place all pieces before time runs out, otherwise Zed will quickly spin in the opposite direction and all the pieces will go flying and you will lose!