I've downloaded the map and now for the review:
The map doesn't look the most visually stunning but it actually looks like it might play in quite a unique way (or least in a fun way). The concentric ring system and building placement makes me think I would want to play this
Now I agree with what has been said before visually it does look fairly similar to SG2 and SG4 but not so much that it can't be added with changes. I would mix up the theme to give it a better chance (without this I don't think your map will be accepted)
Also for the corn I would increase the seperation between the chests (I think it makes it a bit fairer).
Overall I feel its a good map (something I don't often say) but could do with some improvements. I hope this with changes gets accepted