I hate to break it to you but the melee you made is rather lacking a lot of stuff:
-Starting Location are ludicrously far from each other, gold mining will be a pain especially to UD and NE which will lead to GG.
-There is no actual good creep out spots for early scores, all of the creeps on the map is in orange level.
-Terrain is lacking too much, since its use for detail and tactical for the map's output.
-No Goblin Merchants, just Mercenary camps that are very near to each other and Fountains which ain't useful for such a small map.
Your first melee map is made for practice, not for actual game use. I'd suggest you to at least look at blizzard's melee maps and try to cover up a lot of those ideas from them, you'll understand the cosmetics soon enough.