I'd just like to say I loved the ending because it was funny and cute. The poem itself was good, it flowed well and the rhyming wasn't forced. The only thing I might say is more transition from describing the shadow, which you did nicely to the fact that it was defeated. I'd like to know how it was defeated or something.

PS. If you're bored check out the Review Game and/or its Review Marathon (link in my profile)