Graphics are minimalist, but in a good way. Concept is interesting and at the start, I felt that this might be a good game.
Then, as noted by others, the AI ruins it. I am day 4 and my archers just stand around, not hunting anything. Thus I do not get any money, because no rabbits get killed. This leads to me being unable to build defenses or hire new troops. AI needs some serious work for this game to really shine.
In short, good concept, nice graphics, overall good idea for the game but AI ruins it.