All I ask is to be credited if the pack is used :) Sorry I am still working on the page and I am not familiar with Itch... I just updated the file by the way!
If I may suggest - here's a license to formalize that: https://creativecommons.org/licenses/by/4.0/
And to apply that license just put :
"This work is openly licensed via CC BY 4.0."
On this page.