Hi tamtrn!
Full credit is always required, as per the asset license please! Please see here, in the credit section:
https://jdsherbert.itch.io/terms-and-conditions
This only helps you though, as it makes it easier for me to link and help market your work in my portfolio~
You'd only need to put my name somewhere in a txt or a credits roll.
If you'd like something you don't need to credit me for, we can talk about some custom work and sale of rights, in which case the product may be more expensive but you wouldn't have to credit me, and it would be yours to use anywhere you like.
Many thanks for reaching out!