simple!, go to https://packager.turbowarp.org/ select the first one or the second one (for the second one you have to click file on scratch and click save to your computer)(on the first one you just have to copy the scratch project URL! (not working if you unshare)) now click load project,now if you want you can change somethings like add infinite clones,etc. (make sure is html) scroll down untill you see package,then click package to download,create a new project in itch.io,click kind of project and select html,go to upload files and add your scratch project HTML there,then you just edit your project on itch.io if you want,publish and done! (also sorry if you already knew this..)