Description of the license in description of your work is still written like for an artist (ex. "attributed to you"). You could try to just delete the note for an Artist and leave the rest.
Edit: Sorry, my mistake, it would be better to replace the note with a little fragment saying that user can use it as long as they will credit you by your username and maybe some guideline like: "The only requirement for using my assets is to credit me by my username (SunGraphica) in your work, description of your work, or text file attached to your work".
If you really want to gift me these assets it would mean very much to me. I am trying to make my first game and GUIs are one of the most stubborn thing to find. Your work is really high quality (especially the pack above the comment section) so not only it would be a life saver, but it could also improve clarity, feel and design of my games.
I need to find a way to send you a private message though, because right now I have only my private e-mail, and putting it in the comment section on Itch.io would be a pain later xD