From a Christian perspective, we recognize that God created everything because He has told us that He did (Romans 1:19; Genesis 1; John 1:3; Colossians 1:16); indeed, apart from divine revelation, it is impossible to know anything at all. After all, since God created everything, and "everything" includes knowledge, our knowledge is ultimately created by God, and God's provision of knowledge to us is the very definition of divine revelation.
From a non-Christian perspective, the fact that we know anything at all serves as deductive proof that an intentional and coordinated God is responsible for our existence. Note:
If everything is the result of unintentional (accidental) and uncoordinated (random) processes, then everything is a random accident. Note that "everything" includes our own conclusions. If all our own conclusions are random accidents, then no belief is justified and knowledge is impossible. However, knowledge is possible (even among Atheists); therefore an intentional and coordinated God is responsible for our existence.
In other words, Atheists are too smart for Atheism to possibly be true.
The God who created us has not only clearly informed us of His existence, but also of our own immoral behavior (1 Kings 8:46; Romans 3:23, 1 John 1:8), of His displeasure with those who behave in this manner (Deuteronomy 7:10; Psalm 5:5; Romans 1:18; 2 Peter 3:7, Revelation 19:15), and of His offer of forgiveness through the substitutionary sacrifice of His Son, Jesus (Romans 6:23; Hebrews 9:28, 10:14). He informs us that if we turn from our wicked behavior and place our trust in Jesus, we will be forgiven (Acts 17:30; Romans 10:9, 8:1; 1 Thessalonians 1:10).
If you have not yet asked for forgiveness from the One who made you, right now it is not too late for you, no matter who you are (Hebrews 4:7; 2 Corinthians 6:2).
But tomorrow it may be.
It would be obvious (see the following link for examples).
That it isn't obvious, that in fact the universe looks exactly like the universe would look if no God created it or anything in it, is a major reason why we don't believe in God. There is only one way to explain this massive contradiction: by claiming God deliberately created everything to look exactly like he created nothing. Which entails he is the ultimate Father of Lies. In other words, if God created this universe, then God is Satan.
But this tactic is ridiculous in any other sphere, so it's just as ridiculous for theists to resort to it (even apart from the fact that it entails they are worshiping Satan). "Gremlins cause all plane crashes but always make it look like things other than gremlins caused them" is not accepted as a plausible argument for gremlins. To the contrary, we accept the more obvious conclusion: gremlins don't cause any plane crashes, those other things do. Ditto, God and "creation."
What God's Universe Would Look Like