The Demonic Gate is a Hero Defence map. I played with the Ranger and 3 other players.
Gameplay
Its a hero defence where you must survive waves. The waves are pretty hard from the beginning.
You're alone, no extra units help you.
I suggest you make it 6 player or reduce the difficulty.
There are items, item recipes and tomes.
The skills are mostly object editor, but I've seen some nice triggered skills.
Looks
The game looks good, nice terrain no useless imports and most credit is given.
Triggers/Bugs
I was not able to look into your triggers, but no heavy leaks I think. But I think you chane some things:
1. Shop 45-55 is missing. I was not able to make some recipes due to that
2. Heroes revive with 50% HP. make it 100%
Overall I rate this map 3/5 and think it should be Aproved