No, these are hand-drawn pixel art made in Pixaki on my iPad
You can see more of my art here: https://benhogberg.artstation.com/
Viewing post in 119 Pixel Art Characters (static sprites) comments
These can be used royalty-free with no need for attribution to me if they are used in the development of in video games, but I don't authorize these for use in non-videogame projects.
No particular license because (AFAIK) even creative commons licenses require Attribution and I don't care about that. But if you need a specific license listed, consider them CC BY
"I don't authorize these for use in non-videogame projects" means that it can't be CC-BY...
CC has one license that don't require attribution - CC0 (public domain)
read it https://creativecommons.org/about/cclicenses/ to understand CC licenses better