Since it was yer first, I'd say not bad
Heres a list of things u need for your movie to be better
1.A bakcground
2.Color
3.Sounds not that lame peice of tish tish keep the hitting sound effects but have more different types like XiaoXiao#3
4.make more characters fighting at once
5.possibly life metres would make fight more interesting if ure going to make only 2 stickmen fighting
6.make a finishing move for the guy whos about to kill the other guy.
7.make the battle equal
8.possibly weapons no machine guns and shit just stick with clubs,chains, swords,knives,ect.
9.make it so that the physics of the stickmen respond realisticly
10. time the hits well so everything follows through
Fullfill all these things and you go yerself a Xiao Xiao#3 (made by Gauchinha a very gifted animator)