Try drawing next time
I would be lying if i said i hated sprite animation, but you need to start coming up with some original material. If you are going to use sprite animation then spend more of that time not being put towards drawing into a better storyline. Also the fact that you are using Metal Slug characters undermines the entire theme of "war is hell"
How could we ever take it seriously when little cartonny men are running acrross the screen?