Apart from exporting the animation as a GIF file. I would suggest two more things here
1. Add Background color option in "Export as PNG section. So we can choose the BG color when exporting PNG or GIF file.
2. I don't know the right word to use but when Exporting as PNG when I zoom the character it becomes blurry. I'd suggest adding Sharp or Clear to the character.
Sorry if I use the wrong words.
So that's all. Looking forwarding to hearing from you soon.
Thank you