A credits list in the map description with the names of the authors whose resources you've used is mandatory. That includes models, skins, icons, custom spells, systems. Also, sounds, music and everything outside this site.
This helps you with the models, skins and icons from Hiveworkshop:
Resources in Use by FateGo v0.23 | HIVE
I'm saying what is missing should be added. And from where the models are etc.
Could use a proper/fitting loading screen.
High Resolution Loading Screens
Photoshop Loading Screen Template
Custom Loading Screen Tutorial V1.5
Animated Loading Screens
Also a custom UI would do fine. There are many in
Skins | HIVE
Weird that you select the heroes with WASD and SPACE but to play you need the arrow keys instead.
I advise using a different terrain, maybe more in tone with the anime style:
Aos Template 1.0
Anime Island
Many resources there you could use to make your own terrain.
The hero selection icons can be seen during the fight.
Would be nice to add more game modes.