Not the easiest thing I ever played and I actually love puzzle games, but this is so much trial and error, the signs make it doable though, the balance is actually not that bad and your force the player to change strategy, which is hard to do in such a lengthy game. I think the main thing you should maybe change is to get a story in there so people keep trying, like this it feels like one non stop tutorial, and people probably get tierd of that, also try to give some very easy wins at the start so people know stuff is doable. I think it is a fun game and their is a lot of thought behind it, but it need something to keep you in there and not detach after some time. Keep up the good work :)
fun little game, I am no fan of micromanagment, but you did a good job here at keeping the whole thing intresting, as a tip for further games, dont make the player feel overrun with the tutorial, it is the phase where he gets acustomed to the game play and i would use other short cuts for f1-f4, but keep up the good work, the game itself was quite cute to play^^
Cool game, only thing I dont like is that it seems to be fully mouse controlled, and after playing trough it, even the hand of an experienced gamer will be hurting^^
A minor thing though I would let players start with one of the other nations, strategie for them is a lot easyer to play, and as long as you are trying to get the hang of the controls its defending positions which are easier to hold.