1. Many units and buildings have the same icon. Militia looks exactly like the Armed Peasant and Man at Arms (not only that but they also do the same thing; same with the other Sword troops). For icons, you could either try finding different ones on this site or change their hues with:
Button Manager v1.8.2
BLP Lab v0.5.0
Complete Icon Tutorial - All About Icons
How to Make an Icon
2. The terrain is pretty much flat and repetitive.
3. There is no explanation ingame of what you should do.
4. Barrack and Stables have the same name.
5. Imperial armour has an active looking icon while it is a passive ability (I guess; I don't actually know how it works). You could use the first program I linked to make a DISBTN (passive icon) out of the original icon.
6. Resource Camp has the Backpack ability which cannot be researched because there is no Arcane Vault.
7. The human/first force factions are too close to each other compared to the others.
8. There are only two types of attack and armour. OK... undead have chaos damage on towers...
9. Foundation and possibly other buildings can be built on anything even doodads and other buildings.

You should differentiate units more. They're just stronger copies of each other. They don't even have abilities.
Races/factions are not varied; they're basically the same thing.
The base idea isn't bad but the final execution isn't good.

Awaiting Update.

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alright, looks like there's plenty work to do
thank you deepstrasz

*edit: i double checked the foundation building and i'm pretty sure it can't be placed on top of other things

1. Is it intended for the Worker to not require food?
2. Some units are still alike and have the same icons. Maybe you'll change that in time.
3. Naval Technology upgrade's positioning isn't correct. It moves to its left when melee weapons are researched. Melee weapons one takes the place of the ranged weapons upgrade.
4. Well, Runner and that other unit from the bandits look the same. Why didn't you colour the night elves yellow too?
5. You could mention in the unit descriptions if their ranged is different (write the value).
6. Units are still not differentiated enough. Look at how those in the original game are made. They have roles either through their armour and attack types or movement and attack speed or they range and abilities,

It's a step forward. Perhaps you could also make it so that only two players/factions play at a time not forcing everybody to be in?

Awaiting Update.