Bugatti...we were good friends back in Ascendency...but don't take any offense as to what I'm about to say.
I don't think this map will stand a chance against other maps. Why? Well, have a look at the theme of it. It's one of the most overused themes there are.
Let's start off with this. Ever since Wyverns Wake was taken off, we've been having WAY too many maps with different types of biomes in it. It's honestly getting out of hand, and should be known that no map with the theme will probably get accepted.
Now about the build. Cornucopia is too basic. I don't know what I would add to it, but it's too basic and this is where your creativity needs to come in and kick some butt!
For my final point, you see those slabs you have around corn? Yea, not a good idea. This makes it look weird and abnormal. I suggest just taking them out and making the tributes jump over those blocks!