You're right. Have to add a license note later.
And yes you can use these assets in your commercial projects.
Is credit required? By credit I mean a note in the description of my game saying something like "Cursor made by deburger". Some artists want their customers to include that even after paying so I thought I'd ask.
Thanks for asking. It is not required, but I would appreciate it if you could place a link to my on itch.io page or profile somewhere.
Thank you!