* That shading is definitely more lion-y
* You seem to be editing in Adobe 1998 colorspace. For most pixeled works, it's generally more sensible to edit in sRGB colorspace.
* I just noticed, your colors are not gamma corrected (which means on a typical monitor they will appear much more similar than they should on a real CPC). You can fix this by applying gamma 2.2, or its inverse, .45, depending on how your paint program works.
* The color usage is better than I thought (after I applied the above correction)
* What I actually meant was that the background could use a little black to define what it is. I tried it quickly, didn't work out (as you can see)
* The ear seems to a) be 'cuter' (obviously rounded shape) and b) be more obvious, in the reference pictures I've looked at.
* The lion's torso could have better volumetrics. My edit fiddles with this a little.
* I looked at the grass color and promptly changed it. Now I have not decided whether it actually needed changing or not..
* You're probably overusing dither a bit on the mane.. I think this is because you don't have dark red, #ba0000.
* Blue pixel on the flowers looked a bit odd to me, I tried a red to replace it.
Something's wrong with my edit, I'll show you it regardless:
Ah! -- it's the black.. your black seems to not actually be black! Check it! It's 040404! (in a colormanaged viewer, all will look okay since 040404 is sRGB black in Adobe 1998-- however on the web you cannot rely on functional colormanagement and should assume sRGB.. for the next few years, at least
(firefox3 displays it correctly)