I'll start off by saying, sure I'm biased, since I did an egyptian version of this very map myself (in the posted map pack right below this one). Because of that I found myself curious to check this one out. One word: DON'T. You'll find, bears, caribou, etc... he didn't spend the time putting any eye candy in either from what I can see... again I'm biased... as I had papyrus, seaweed, hawksbill turtles, savannah grass patches...
The mixing of the sand terrains also looks bad, the random/straggler trees being savannah trees is interesting, but doesn't work either IMO.
Don't let me discourage you though... everybody's stuff sucks before they got the hang of it. The only way to learn is to know when you've done poorly so you can improve, and this is 2 star map because, hey... at least there's no grass anywhere :)