Stepping back from the purely religious aspect of the Biblical account, it’s fairly obvious that the flood account describes some sort of cataclysmic impact to me, to have “opened up the fountains of the great deep” as it was described. Such an impact could very well have altered the orbit of this planet, couldn’t it? The rate of spin could have been reduced as well. There are a number of ways this planet could have been flooded as described but it’s dismissed as impossible by people who know better. A large icy comet? There’s a possibility. I recall reading recently that there is a great deal more water contained within the crust of Earth and I believe under fairly high pressure, am I recalling this incorrectly? What would a large extraterrestrial object such as a comet or asteroid cause, in light of this, and how would an ancient have described it? As opening up the fountains of the great deep, maybe?
If you start considering the energies involved, something that would change the rotation speed would involve survivable energies, changing the orbit would require more energy. An if you want to shorten the year you have to move closer to the sun. A short enough year would put us in Venus’s neighborhood.