The map should be called Melee, not Altered Melee. There is a big difference between the two category as for such, the Melee category resides with the actual Skirmish scenario used for Blizzard's custom maps e.g booty bay or terenas stand, the Altered Melee is more of customizing the said Melee with dramatic changes of the tech-tree or value of the game's conditions, e.g 5 heroes can be played instead of 3, faster building structures, etc.
The map's size is ridiculously small, where as you have known when playing Warcraft 3 maps there is a huge techniques or strategies in playing it, and one of the first thing that hits me on this map is Human Rush, its a tactic where you construct lumber mill quickly and send a couple of peasants to the enemy base by constructing guard towers and maintaining it until you destroy the enemy, this also includes adding more peasants or send a Mountain King to defend the offense.
Much of what I played on the map, again it is very small, it lacks space to give into expansion sites (e.g goldmine), creeps to hunt from low level camps to the red big ones, a region where you can tactically set some plans in order to win the game, and lastly survival.
You can't creep out the hostile units due to it being impossible to attack while having a near player enemy near you and ready to attack you, this gives the map 5-8 minutes worth of play time.
For now, I can say this is good for practice, but not enough points to let this map good for approval.