Well...
First, i am so impressed by your animating skills:O, but really you should improve your story, i mean, a guy who lives underground all of his life. One of my question is how they got food? then he jumps up and kills alot of guys and he knows somehow that he is after that guy in the tower and he is going to kill him..and then the fighting start, so they heavy metal music begins, i must say that that kinda ruins the mood..so yeah work on the music, and the lines, give them more medievil lines.. so yeah!