Hello I briefly played your map and I have a few comments
---------------------------ABOUT THE MAP-----------------------------------
[*] Your loading screen is great but it needs description of the map, objectives, what to do, and etc. Even though its already explained in the game itself which was well done I still think it needs it.
[*] Follow up of the explanation you can briefly say what to do with the game text trigger of what to do, and possibly use pings of where you purchase your units from and where they should go. Like an Example "Ping where the workers are and say to gather gold and wood and ping to where you purchase the units from and ping where they should go etc.
[*] The units you have used I've noticed are default from the Warcraft editor, its cool to use but in the description you could add the damage, health, defense, and special abilities of the unit. Or you could just make up your own units which would be even better, a lot of the default ones to me just seem to be fillers, I would only ever use the heavy hitters.
[*] Possibility of after you purchase the unit they automatically go towards the destination point instead of you just clicking and pointing, could make things easier.
[*] The tree was generating my enemy units mana,,,,? And also I the player could cast frost bolt on it...if it was meant not to be a structure...Overall balancing of the tree itself is well done.
[*] I really liked the music and sound effects well done.
----------------SUGGESTIONS----------------------
[*] About the units themselves you could do upgrades for them such as purchasing damage, health, defense, attack speed, and etc.
[*] You could also add maybe Aura towers to give units an advantage, and possibly make a weather or environmental effects tower to purchase for an example a Blizzard to slow the other teams units attack speed and movement speed, or Wind Storm to make the other teams units miss on attack.
[*] Possibility of adding rounds giving a time limit of making the units and even making a food limit per round...? For one thing I know a lot of players will def mass units. I think it will be better if you could add a food limit range per round if you do add rounds and the uniqueness of the custom units you make if you want or default ones could add a lot of strategy to it.
Thats all for now! I hope my comments have been helpful