To get these tools running in the browser, I compiled them to WebAssembly (see https://github.com/biowasm/biowasm for details). That way, the commands you type run instantaneously, and it doesn't cost me an arm and a leg to host servers that execute arbitrary commands from users :)
Seriously, well done!
The problem is that your playgrounds, and https://www.podsnacks.org/, and the restaurant notifier https://try-something-new.web.app/ got submitted today and I find them all really appealing.