Look like I did use too much colors without knowing. Indeed 200 colors are unneccessary. I tried to fix it but its too many colors to fiddle with so I'll just delete this and post another artwork. Thanks for letting me knoow :)
This is a very good start for a pixelart piece. I don't know the reason why, but while it looks like the picture should have a handful of colours in the palette, the Image Specs Tool says there are almost 200 colours, lots of which seem to serve the same purpose as one another. If you could find out why that's the case and vastly reduce the number of colours while keeping the readability, I'd be happy to push this submission through.
Great hand! That sword would make a good letter opener =D
Don't delete it. It seems to look as it would be really easy to unify most similar colours. I believe it would not make a lot of effort to reduce the colour count to around 100.