We only support a subset of HTML. We don't support markdown directly. You can access the HTML editor on the description by clicking the </> button. We'd like to add direct support for markdown in the future but I don't know when I'll start working on that. Thanks
Viewing post in Embed itch widget on Github
Oops, my mistake. Not sure you can do that. We currently only provide a iframe based widget and I'm pretty sure GitHub doesnt' allow that. But, I think it would be cool to make a SVG based embed that you can put anywhere that supports images. I'll make a note about creating something. If you end up making something, tell me, I'd be glad to check it out.
Thanks