Glad it helped! :)
Yea, for my profile page’s CSS, you’d have to build the CSS from the repo first. I’ve put the installation section for that in the readme. Its quite a mess of a system, because I want to save characters count. itch.io limits profile page’s CSS to 5120 characters for some reason :/
And yep, you need your itch.io’s username, instead of the display name for the Author Badge.