Oh, another condition, never an actual answer.
OK, how did they build a boat large enough that would be structurally sound?
How many weeks would it take to fill the boat?
What did the animals eat after the flood was over?
Why didn't the lions eat the zebras?
etc etc etc...
Ho boy, where do you propose that this happened then?
"Or how the koala's made it without eucalylptus leaves"
Are you sure that this was their diet at that point? Creationism allows for change, but not the same kinds as evolutionists. Creationists allow for "degenerative change" and "pre-programmed change". The "pre-programmed" kind is not "today you will look like this", but more of built-in adaptations to certain environments, which can be triggered by certain events (epigenetics has confirmed that environmental influences can affect offspring in heritable manners).
"First the reason for the flood, maybe the 'flood' did not encompass the whole planet just the whole known earth that the writer knew about."
That's a possibility, but I think the earth has a pretty good evidence of global catastrophe.