a number of problems arise here , apart from the whole issue of creating anything .
firstly you dont have any of the major forms of plants or animals or fungi living in isolation , the are all part of a giant ecosystem called life , there is no good creating a plant with out creating something to fix nitrogen for the plant , no good creating a mammal unless you create some thing for it to feed on ie plants or other animals , so you have to in one shot create a whole range of interelated lifeforms ,all interdependant on each other .
well actual you done need to do that , cos if you can create living creatures i guess you can just make the world obey any rules you see fit , and you just create a world where 4.5 billion years ago one of each kind formed , then create the intervening history and start the time running from yesterday and no one will know .
once you accept creation its kind of hard to apply any sort of limit to the creator
in fact may be the creator created a universe where life does arise from a chemical soup and then evoles into diverse life forms !