Hi. Publishing to unity might require some time, because of their guidelines, etc, so I suggest, maybe you can pay me directly to my paypal: chierit.art@gmail.com and I can email you the specific asset that you need, if you can't buy on itch. :)
can you publish other one(anything goes)in unityassetstores? (total amount is every sprite) so that I can pay. last send me the sprite by email
