not much I like about this sprite, although its nice to see a custom sprite for a change.
however I dont really like how the outcome but I know you have potential
so, I did an edit:
as you can see, I started with your sprite, grabbed the basic lineart out of it and changed it into one I thought looked better.
I then coloured it (perhaps I should've saved more of these stages) I used the same colours as your sprite at first which I later tweaked and I aa'd and gave some subtle selout.
for extra credit I also did you south run anim cycle, because you did a four frame anim I thought I should show you how to get nicer results for almost the same amount of work.
I suggest examining each frame and then taking another swing at it