1. None of the hero icons have DISBTNs. They look like green squares on F10/pause. Learn about it here:
Button Manager v1.8.2
BLP Lab v0.5.0
Complete Icon Tutorial - All About Icons
How to Make an Icon
2. Ranged Stomp doesn't say how much damage it does and doesn't give any details and nothing about the spell's levels. It has no hotkey, at least in its title and when learnt instead of being on the first position it's on the third.
3. Enemy units don't come after the heroes, they go to a region and turn back.
4. The map layout isn't too interesting, small and kind of narrow.
5. Items are few and generic. Most spells are Warcraft III ones too. There are no items for other attributes than strength apart from tomes.
6. Round 4 begins in but there was still some undead archer hero to the south and still remained.
7. Heart of Sandworm doesn't say how much life it regenerates.
8. Glyph of Fortification? Doesn't do anything.
9. So, you can hire mercenaries but they don't get full HP?
10. After round 5 nothing happened anymore. Played solo with the Ranger.
11. Towers and Wood Generators can be built on other buildings, doodads and destructibles...
12. Demolish has a passive ability look. You could make it look active with the program I've linked earlier.
13. Magic Fire from the Tower doesn't say what exactly it does: damage etc.
14. You can limit the number of Wood Generators (there's a trigger action in the Player subgroup) to build if only one gives lumber.
15. So how's the Architect fair towards other heroes? This hero seems to have an advantage, basically like having more spells. Also, the abilities in the learning tab are weirdly placed. Compare positions with spells on WcIII heroes.
16. Try adding the Locust ability to the Wisps so you won't be able to select them and see that they could build a Town Hall

Also, set the model to none in the custom subtab if you want them invisible and remove their shadow in the Art Object Data section.
17. Frost Breath's buff (Freezing Breath's from the Frost Wyrm) looks weird on units and it also kind of blocks clicking vision.
18. Bloodthirsty Aura has an active ability icon. Are you sure it's 50-125-200%? That seems huge and I still haven't got Very Fast Attack Speed one the third level without Gloves of Haste.
19. OK, it got past the 5th round this time and a dead orc body was talking to the orc boss even after he went out of the place. Plus, the camera did not properly reset. It should pan over your hero's position. Moreover, because I was in the enemy spawn zone, my hero and the orc boss were teleported in the base... He didn't drop anything by the way.
20. I think tomes should refill sooner for all heroes to be able to buy.
21. Please change the troll child to not be a child.
22. Nothing came after the 9th round. Check your triggers and conditions.
I advise a terrain overhaul. The aspect of it combined with the rest is quite simple.
Each hero's role isn't defined, it seems random like combining Slow with Brilliance Aura and two DPS spells on an Agility hero.
Could be useful to set the hotkeys for the spells to WERTY or something similar.