Hahaha, thank you! They're certainly fun to make.
I'm not sure what the license name would be in this case. You're welcome to freely use or modify them for personal or commercial non-NFT, non-hate speech work, just please don't redistribute them!
I'd love to be credited or shown if you use them for something, but it's not necessary. When I can't find assets for a project, I make my own and then try to clean them up and share them so other folk have something to use.