1) Cut some pieces of onion to resemble teeth. When forming the meatloaf, create a mouth shaped indentation and firmly stick the teeth in place. As you add the pasta "bandages", be sure to allow some of the teeth to show through.
2) Substitute marinara sauce for the ketchup/mustard/brown sugar mixture. Omit the ketchup mixed into the ground beef as well. Add some Italian seasoning. Use strips of bacon in place of the pasta to make it look more like a zombie than a mummy.