I get what you are saying but I also feel that the design/implementation is on your shoulders rather than that of the itch.io website.
The primary focus should be on end-user experience first and foremost. Multiple-'click to play' things that aren't YT videos are a negative end-user experience. Even when they are YT videos it can force the page to load much slower than normal.
Consider using a game engine (like GoDoT) that natively supports exporting to HTML5 so you can fully experiment with your ideas standalone prior to making it a 'web app'.