Accessing Worlds for the first time is convaluted at best. It would be helpful to have an intuitive, step by step, guide on the process of downloading, installing and using the app for the first time. I was able to get Worlds downloaded pretty much by dumb luck and some feedback found here in the Beta forum. It could be more self explanitory.
I'm sure you're developing this... just wanting to share my experience. Keep up the great work!