This is an impressive amount of content for a 1 week game jam. I appreciated the simple art style of the characters an enemies. I think it is an interesting take on the theme. I got quite far before the enemies started spawning. Watchtowers were good until the dogs came out.
I grasped the concept quite easily, but an RTS is risky business for a game jam :) I really like that its not another platformer. You could make the UI more minimalistic without sacrificing any information and maybe show the tutorials with pictures of the buildings.