This is a very poor melee map for multiple reasons:
1- The terrain is too cheap. It's completely flat and mono-tiled in the starting areas. Using more tiles and some raising/lowerings will be surely better. A lack of doodads is also another reason for your cheap terrain
2- The expansion gold mines are placed in terrible locations. They are too restricted to build an expansion base and surely too vulnerable to enemy units. I mean, the enemy can directly access to the expansion base with extreme ease
3- The Goblin Merchant is unguarded?? Probably you did that because it is too near to the starting locations but in all cases, Neutral Passive buildings (Tavern excluded) must be guarded by some creeps (except Way Gates, they are not mandatory)
4- The map is too boring to play (and that's what ruins everything about your map)
5- Map Type: Altered Melee?? Wasn't this a melee map?
This melee map is not good enough to get approved. I'll have to vote for rejection. Next time you make a melee map for 4 players, be sure there are much more creeps and that the expansion gold mines are not in restricted areas.