You need to reread the Bible. That ark is completely wrong. We’ve been tricked for decades by artists who mis-imaged the ark.
Noah’s ark is all black and tight as a drum. There isn’t an upper deck at all. It’s lit by a tsohar.
Let us do it together:
"14 Make yourself an ark of gofer-wood; you are to make the ark with rooms and cover it with pitch both outside and inside. 15 Here is how you are to build it: the length of the ark is to be 450 feet, its width seventy-five feet and its height forty-five feet. 16 You are to make an opening for daylight in the ark eighteen inches below its roof. Put a door in its side; and build it with lower, second and third decks."
Genesis 6: 14-16