I haven't sold any packs, but I took a look at your page.
One suggestion would be to remove the tiled background to let the dev focus on the animation work. I think the color palette is good, and I didn't notice any typos.
If you haven't, perhaps blast your page around social media to drum up some interest. You can also contribute to OpenGameArt and other dev repository sites to help build up interest in your work.
I hope you get some sales!
Daniel