JS redirect service with delay

To my Hitster clone I realized that a delay before the song starts playing, would be great! They seem to have that in the later versions of the Hitster game. They implemented it via a custom app, which seems cumbersome. I couldn't seem to find a way to embed the delay in the QR code, so after asking Claude about my options, we came up with a pure frontend solution that you can link to. I posted it under /tools/redirect on my page. The page takes two query parameters, url for the url you want to redirect to, and delay for the number of seconds delay you want. By having a pure frontend solution, I don't get any server traffic, but I lose the ability to log and get analytics. Feel free to steal or amend my solution, it's all in the non-minified html of the page itself.