Hmmm

Why didn't you do more of the poem? even though it's one of the most dry and drawn out poems of all time, no help from johnny cash (or however you spell his name), I still think it should've been completed ^_^
And, as stated already, more visuals would indeed be a plus.

Needs much more...

You need to have a variety in the visuals instead of a guy sitting there flapping his mouth. Have visuals to the poem, and don't have it repeating infinately.

Ummm...

Well, I guess it was nice you did an animation about this famous poem. But all it was was a guy telling a story. Maybe a little bit more?