So, in the level menu, you can click on all kinds of options, but you can't mix and match. On more modern menus you can filter and combine all sorts of options. An example is, with the current menu system you can only look at levels you have not completed and very long levels separately. But, with filtering, you could combine the two and have very long levels you have not completed. Obviously, this probably won't happen but it would sure be great if it did.