Thank you for trying it out!
It’s not a bug that the orange background is not there haha. The simple fact is just that it wasn’t included in the jam build. I made the page visuals and the other “promotional” materials after the jam deadline. I was just scrambling to wrap up everything until the end, and the background was not part of it. I guess you could say it’s a bit misleading, but I figured it’s fine for a jam game only anyway, so I will update the game after the jam.