Visuals looks awesome. I was a bit lost gameplay wise, my units were not really attacking so i just ran but never reached the end of level. It feels like this could become a really cool adventure, remind me of some Warcraft 3 scenario. Would love to see more.

Game assets and environment looked good, but it was unclear how to attack. I think the units started attacking on their own, but it was hard to tell as only one unit would attack at a time even though they were all surrounding the enemy.

The two separate controllers seems like it could be fun for two people, but it was hard to get a handle on the controls as a single player.

With more of what you were planning I could see this being fun, but I would seriously consider if both the necromancer and the deathknight should always be in there. Perhaps have just necro for 1 player and is you select 2 player from the main menu it enables the deathknight. Just a thought.