The legs look a lot better than the original Maybe a bit too shiny?
I noticed they were metallic, but failed at shading it properly
I prefer the left arm pose in the old one, but with some improvements.
Also I don't know why made a human skull. It would look cool if you made it a bit larger so it covers the shoulder completely.

By the way, edits are meant to be an example or guide in order to help other people improve their own creation.
I personally don't mind if you try things on mine or whatever, but keep that in mind

I really like the character design
I think the highlights in the yellow cloth makes it look metallic and the hair could be more saturated.
This is how I would draw the girl (don't mind the weird arm pose and the missing limbs ) I also made some shapes softer.


Looking at it now I think the mid shadow in the hair could be a little too bright.

Thanks SmashAdams. Yeah, I'm going to make a couple of tiles for the ground.
You've got a point BadMoodTaylor. I think I would just erase it, but it was just a quick "sketch". You can notice it's two hills copypasted a couple of times

Then I think it would be a lot more helpful if you redid it with your current knowledge and asked for critique on that new one :/
But if you wanted to know what's wrong with this one I would say it's mainly the low contrast and using non pixelart friendly tools.