Yes, please check those accidental colours here try to get rid of some of them. I think at this state going down to 30 would unnecesary take too much time. It woudl be enough if you clean at least those 0,1%

Hi, Welcome to PixelJoint!

It Is a wonderful pixel, but PJ have built-in zoom tool. You have to upload it in real size (1:1, without scaling) to be approved.

I see you used 71 colors (instead 80). A little tip, I think you can reduce that number (maybe 30 or less) because I detected a lot of orphan pixels with unique color ;)