You don't need to pre-zoom or include a background for PJ. Just upload the 1x (64x64) version :D The site has zoom buttons so people can choose how big to view it. Plus, 64x64 fits in the 100x100 limit on preview images, so you could just upload a preview image and no detail file at all.
yeah,sorry for that,i haven't done pixel art in a long time and this was for my twitter and i just upload it here.Still thank you for the reminder