Q1 - Who is God?
Vanteezy, I'm sure you know the answer to that question. He is Almighty, our creator.
Q2 - What does he look like?
No one has ever seen God. We have all seen "pictures of Jesus" but has anyone seen a picture or photo of God? NO. His presence is too much to deal with. A lot of glory around Him.
Exodus 33:20 God said to Moses "Thou cannot see my face: for there shall no man see me and live.....
v22,23. I will cover thee with my hand while I pass by and I will take away mine hand and thou shalt see my back, but my face shall not be seen.
Q3. Does He see over us at all times?
Yes, He does. God is Omnipresent which means He is present everywhere. Even if you hide in a cupboard, He sees you.
Psalm 33:13,14 - The Lord looketh from heaven: He beholdeth all the sons of Men. From the place of His habitation, He looketh upon all the inhabitants of the earth.
He even sees you now reading the answer to your request.... and sees your every thought.