How do biblical literalists defend that if a star is 10 million light years away and we can see the light from it, therefore the Earth would have to be at least 10 million years old? That is, because one of the laws that God set is that matter cannot be created or destroyed. All matter would have to have been created at the same time, when God spoke and all was created (secularly known as the Big Bang).
"God is not controlled by laws of science" I don't know whether you can share this idea with me or not. The truth is, science cannot explain everything. Simple things like dreams, thoughts, feelings and emotions cannot be explained by science. Science can only understand the things that human can see, touch, feel and hear. I don't think the law of science as we have here on earth or this universe will still apply in Heaven. The place where God dwells will surely have a different science. For instance, I don't think the light in heaven will consists of only seven colors, it might have more. I also don't think gravitational force will have any effect on God or heavenly beings while even light can be attracted by gravitational force, according to Einstein. For example, in the movie "The Matrix", everything inside the Matrix was programmed using advance computer languages; the gravity, the taste of food etc. were all designed but it was different from the real world in many ways, it was incomplete. While you can bend the laws of science in the Matrix, it's not the same in the real world.
"God created science" If we can believe that God created this universe out of nothing, we should also believe that everything, and literally everything in this universe came into existence by the mere words of God. That would include the laws of science which governs this very universe; the speed of light, law of gravity, law of refraction, planetary motions, rotations and revolutions, birth and death of stars, etc...
God said, "Let there be light" and lo and behold, there was light! God created the light with a single sentence from His mouth. Creating the light means creating the very nature of it, it's speed, it's power, the substance through which it can pass, the energy that it carries, its behavior and so on. For instance, when a car is designed, it's speed, it's size, etc. are decided. In the same manner, God designed the speed of light, the speed of sound, the mass of every particles.
"God is bigger than you can imagine" It doesn't matter you believe in Old Earth or Young Earth, the most important thing is how big can you imagine God to be? How powerful do you think God is? How far can you put your faith in God. If the Bible says God created the whole universe within 6 days, do you have a problem in believing it?
I am the Lord, the God of all mankind. Is anything too hard for me? (Jeremiah 32:27, NIV)
It depends on the literalist. A Young Earth Creationist would directly challenge the scientific method used to define the speed of light and therefore the light year. Other literalists might shrug and say who can know the mind of God. (Romans 11:34)
Also, when arguing the age of the universe old/young universe proponents often argue that it is a cumulative case which involves several lines of evidence from several different fields. Therefore, in addition, young earth creationists assert there are anomalies in several old earth dating methods and they claim there are dating methods which show a young earth. See: How old is the earth? and 101 evidences for a young earth
Also called the "Omphalos Hypothesis," the idea is that when God created the universe, he did so in such a way as to make Creation appear to have a certain age. Thus, Adam had a belly button (even if he didn't need one per se), light starts already along its path, and rocks look old.
From a philosophical point of view, there are problems - Last Thursdayism and the Five Minute Hypothesis essentially cry "unfair," since it makes the hypothesis unfalsifiable. Regardless, however, it is a common defense amongst Creationists, including the Institute for Creation Research and the "Creation Wiki".
It should be noted that Old Earth Creationists consider themselves literalists, and hold that light was created in Gen 1:1 along with the rest of matter and energy. A Spirit who happened to be hovering on the waters made light to appear as dust was coalescing around the dustball we now call Earth. A defense of the literalness of an Old Earth Creation exegesis can be found at this link form Reasons to Believe.