Interesting game idea, at first I was thinking of making something very similar but with zombies and regular human survivors. Nice to see you guys made it into a fantasy game.
My feedback would be to improve a bit on the enemy AI since they are quite tough right now, lol. They were killing me from miles away, so a quick fix would be to only let them shoot at a specific distance from the player, just to make things more fair for the player. Or if you want ranged units that can shoot from very faar away, maybe ad some sort of visual queue of when the are going to shoot you.
Other than that the game is pretty fun and challengin, thanks for sharing and keep up the goood work.