Are you sure you've credited all models and resources (sound/music etc.)? I'm also referring to those which are not from HiveW.
You should not mix melee type of loading screen with that of custom games/campaigns. I recommend using the latter.
1. Many icons have no DISBTNs. They look like green squares on F10/pause. Learn about importing icons properly:
2.
Button Manager v1.8.2
BLP Lab v0.5.0
Complete Icon Tutorial - All About Icons
How to Make an Icon
3. Abilities need proper descriptions. Now, it's some 1-2 words or letters with some numbers:
Tooltip Tutorial
Creating Good Descriptions
4. Terrain is pretty lackluster and there is much blank space.
5. The orc unit near the human trainer has no name.
6. Pulverize is a passive ability with an active icon. You could make it look passive with this:
Button Manager v1.8.2
7. Use the other Play Music trigger to avoid playing it as sound.
8. The gameplay is repetitive. You pretty much kill units on the map. There is no imminent danger. You choose whom to fight and when.
9. Pet item descriptions don't say what they do.
10. Used Behaviour on the Knight near the Tauren Chieftain and then killed all creatures and the forgotten one in the zone I was moved to but then I coulnd't get out anymore...

I had to use the -recall command.
11. Using Behaviour on some units will make text like : P: 5 3 appear....
Awaiting Update.