"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.
"That's a possibility, but I think the earth has a pretty good evidence of global catastrophe."
Oh really? Where did you find this evidence?