Answer:
I grow up while growing down
I am a mini solar powered computer.
I am an object which is used in baseball. During the day I can't be seen at all. What am I?
Two bodies have I, though both joined in one. The more I stand still the faster I run. What am I?
I am created through suffering, inspiration, joy, and even despair. Born as an idea, and then presented to the human eye. Unlike living things, I never die. What am I?
Do what he says and you'll be fine, don't and you lose the game.