I think the part that bugs me is how the upper body is facing perfectly forward in every single frame, like a in a march. There isn't a lot of shoulder rotational movement. It is hard to keep your upper body aligned like that if you're dragging a limb. If he is actually limping away from zombies in a hurry, his opposite arm should be swinging forward to act as a counterweight for when he pulls his injured leg forward.
@Retronator I shortened the frame where he is only on his bad leg. Also, I'm pretty new to animating so I know what you are referencing about wire-framing but not sure how to do it exactly. And new to Aseprite. Basically, don't shade anything until after?