Currently, the header image is like a normal image (no link back to the home). You can use the header logo image that will redirect to home page if you like. Making the header image as link depends on the theme, in this theme, we have designed this to be a normal image. However, we will think about this in our version updates of option to make it as a link.
@Susan Yes, we will keep on adding features and crushing bugs as we keep updating the theme. Also, We would really appreciate if you could rate our theme at WordPress repo here www.wordpress.org/themes/spacious. 🙂