Actually according to the Bible God did not create things to age and die. Death itself (physical and spiritual a.k.a. seperation from God) was a consequence of disobedience, before the eating of the fruit, life was immortal. I believe that God created mankind for the purpose of glorifying Him. However unless we had the choice to not glorify Him then we would be mindless robots and our adoration would be worthless. However If we have an alternative to the original purpose and we still choose God, then value is added to our praise and we have some worth in God's sight. Unfortunately the only existing representatives of our race chose to reject God and in their rejection all of humanity is guilty. And that is what Hell is, eternal seperation from God. However God has granted us an alternative, we are already dead (being born in a default state of rebellion and therefore spiritual death) He simply offers to revive us.