When I try to mention the third-party assets, I use the key enter to add an another line of mention. However it publish directly my game without warning. I want to edit it to add the remaining third-party assets and skeleton code I want to mention.
On your submission page (linked on the button that says "submission to bullet hell jam" in the top right corner of your main game page), there's a link to "edit your submission" - that's how you'd make those changes ☺️