The colors on your work is really well done! The pixels are super clean too, and I can tell you're good with animal anatomy!
I think my only critique would be on the shading
Some of the shadow shapes on your drawings, for example in this one: https://toyhou.se/jackaling/art#20730077 are a little vague and seem to only cover the edges (which kind of results in us not entirely knowing where the light is covering. I think the term for this is like, "clouding"?? I don't entirely recall. It's really clear on the pants part. I think if some of the areas you didn't shade on the pants, (like the hip area on the right side of the pants) were a darker shade from the local color,
You did a really good job with the shadow on the back leg in this one! But the wings have the same issue where the shadow is really only on the edges.
But yeah, It's best to follow with shadow shapes like so, which would define the 3D shape of the image better
With your permission, I can do an edit to explain what I mean with the shadows! Let me know if you have any questions