Tell me if this poem is written for children, teens and young adults, or adults:

Underneath my outside face
There's a face that none can see.
A little less smiley,
A little less sure,
But a whole lot more like me
system
This poem is written for adults. It explores the complexities of the human psyche and the idea that what we present to the world may not always align with our inner selves. It also uses more sophisticated language and themes that are not typically found in children's literature.