Killed the goblin king in around 15-20 minutes. As promised in the thread, I'm leaving some feedback.
This is a fun a little game. It reminds me of settlers where you can occupy structures with your peasants and they work there. I managed to win by first clearing all nests and then assaulting the king. For fun I threw 12 non-archers at the boss to see how they handled it. Nobody even managed to put a finger on him, the dude is an arrow machine gun.
I struggled with the controls a bit. Sometimes menu options didn't select and building itself was a bit counterintuive, clicking a building and then trying to place it down canceled construction. Eventually I realized that to build I had to press right click instead of left click. This is a bit confusing, most RTS use left click once you have the building selected.
Since I didn't have any houses I was being overwhelmed by goblins. Thankfully I kitted them with a human while I tried all sort of things to get a house build up. Once I got three houses in I managed to keep the goblins at bay and expand the settlement. It was a bit hectic though.
Also I liked the placeholder sound the humans made.
It is very early, but it looks like it could end as an interesting game. I hope you can keep working on this and be able to develope it further.