Yes, CREATURE is a Scrabble word!

Letter values in Scrabble US: C 3, R 1, E 1, A 1, T 1, U 1, R 1, E 1.

Is it a valid word?

CREATURE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a living organism characterized by voluntary movement
a human being; `wight' is an archaic term
a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else

Also: animate being.