I'm always into any DS stuff and this concept is lovely. But I'm struggling to accept the art becasue of 101 colours. PJ gallery is very triaditionalist-oriented in terms of pixel art and we accept large palette work when we see a justification for it. Most common examples are very busy and rich, colorfull pieces or large compilations of sprites, but there are other possibilities. The 101 is not super large in general, but in this particular piece you have a different colour used for every little new thing. It would be very easy to recycle many colours, and reduce the most similar ones to contain the palette into a smaller package. It's also a very good practice.
Also you have a pretty obvious banding on the veil. This one is not a deal breaker, but something to look into aswell.
Hello! Thanks for your feedback and advice! I re-submit it and reduce the number of colours to 53, hope this change will make it better!