Impressive, thanks for sharing.

Thanks for your feedback. The failed banding was an attempt to simulate the shadow of the stained lines, but now think i should have used a simple antialiasing, instead. I agree with you, then.
Thanks ;)
 

There is a lot of banding around the outlines. Banding is when areas of different colours line up together, and it makes the piece look blocky and pixelated, something generally avoided in pixel art. You avoidd banding in some parts where you treated the shadows more like antialiasing, and that looks good! If you have time, I recommend doing the same elsewhere.