The graphics, and animations especially, are really stellar. I also like the main gameplay mechanic, though I would have liked some kind of goal to build towards. As far as I can tell, you just build stuff, but there's nothing more to aim for to "win".
Having the villagers cost nothing to make is maybe a issue, as it makes them dying essentially a minor inconvenience at most (and probably not even that). Maybe there should at least be some kind of recruitment time or whatever so that there's a cost to losing a person?
Also, my knights were constantly just loitering around on the wrong side of the map when goblins attacked, leading to them taking ages to get to the goblins, and thus having the goblins kill some builders despite me having a veritable army of knights (like 15).
(Oh, and the fact that the builders and the gatherers look exactly the same made me confused about what "Lumber" did for a long time.)