The lineart should be all right now.
I've still found some minor mistakes in it (the left boob, the foot, the leg and some other minor things) but it's okay now.
On to colouring.
The first thing I have noticed was that smoke which you just slapped over the figure and then lowering the alpha value.
Don't do that.
It turns your 8 colors into 36.
Pixeling is all about doing everything by hand so don't use alpha lavers.
The second thing are the colours.
The ramps are pretty dull. You should experiment with hue shifting.
In my example I put in some blues and reds to make the colours look more interesting.
The last thing is the shading.
You leave large portions of the character at one solid colour.
Expand the dark areas a bit to give the character more volume.
If you're doing that you could also try dithering to make the colour gradients appear more smooth.
You could also try to colorize the outlines, black outlines aren't always a good thing.