Congrats on 1st
This is one of the better first's I've seen in a while. It shows evidence of actual effort and a modicum of ability for story telling. Usually I cringe and grind my teeth when somebody puts in the author's comments "this is my first," but this time 'round was different.
Other than polishing up some of your character design (although the skeleton was very well done) I have no criticism. Just continue to make more and learn as you go on your own. You made a good first go of it.