hey , hi there, welcome to the hive!, here some friendly feedback to improve your work
1)the sunken ruin theme has 9 diffentes tiles estandard
your map is 95 % earth and 5 % big bricks
what i mean is you should use differents tile sets to have a nice terrain
in some parts you have sharpy water, that mean when you see the water like a rect line, i think you should fix it with the smooth tool,
2) Doodads: i see you put some in the creep areas, but what the rest? not a waterfall, no rocks, no grass, no mushrooms, no fishes no nothing just empty earth and water? i sugest more decoration
3) the drops arent specificed wich type of drop you will have item random level two you shoud specify if is permanent, charged or enhancer ( like books). I think creeps should be more standard, i think 6 units for a creep camp is to much, and i think naga campaing units arent designed for creep camps (that couple of royal naga camp defending the fountain seems like to much heavy even for a red creep. also i think in some areas the creeps are too near each other without separation
4) game play, this is not designed for FFA, because the bases are to near, humans can use their milita peons to rush their neighbors. Players red and violet can acces the market and the tavern and the center more easy than the neighbors. And the other players can defend their bases more easy than red and violet that will be trapped in the middle for sure. So i sugest to remove the FFA from the description and just leave the 3vs3 especification
5) read some tutorials and learn bbcodes so you can improve your description and upload some screens of your map, if a map is product, the screens are the advertise, you have to sell the map
For your first melee map, i say nice work, but i think your map can be improved, special the terrain and enviroment
see ya and good luck