My Observations :
Lahi ra ang Noah sa biblical story compared to the movie, though it indeed is based on the Noah from the bible, but when you say a film is based on a figure in a part. reference does not necessarily mean the content is all almost exact or accurate.
The film I saw was more the animal welfare type of Noah, and upon checking the writer and director (Aranofsky) he is indeed vegan. I like the movie all the same.
Noah in film originally planned that G-d's creation will continue without man, as man is already judged. Noah's direction was heading to man no longer existing seeing how man has turned out to be.
The biblical account of Noah included man to continue to multiply and breed along with the animals in the ark.
PS
There is a good reason I was only able to see a ripped version where its too dark and the video is so bad.
(Just saying)