Answer:
I work when I play and play when I work
Cold head and feet; round as a ball; always turning around myself.
First I may be your servant's name. Then your desires I may proclaim. When your mortal life is over, I hold all your wealth within my power. What am I?
I cannot be burned in fire or drowned in water
I am cracked by Indiana Jones.
It is an insect, and the first part of its name is the name of another insect. What is it?