You guys think lvl 6 is hard? Wait till you get to lvl 12 (final level). It is stupid impossible. I would like to challenge the developer to post on here and tell me that it's beatable.
How to beat lvl 6: Build Keep, Barracks, Blacksmith, Monastery and Castle in that order. Upgrade Monk and Captain. Create 4 Monks and 5 Captains. ATTACK! You must build everything as quickly as you can click it. Do not speed up the game play. For some reason that messes it up. You may lose one Captain, build another as quickly as possible if that happens. I did this with 2/3 Economy and 2/3 Military with 1 tech point left over (So you will end up with 3 to max out Economy or Military for the next level).
Bereaver is exactly right, 4 monks and 5 captains and I finally got past lvl 6. Make sure you have them both upgraded or it will not work. On the first try it started to work until I realized that I'd forgotten to upgrade the captains and got slaughtered.
On level 6 there is NO WAY the opponent is working with the same limited resources as the player. I've tried everything and can't even come close to beating that level.
Game just totally froze up on me. That sucks because I was beginning to get into it. I'll refresh and start over, hopefully it won't do that again else I'm done playing.
I've never posted that any game deserves badges, but I just completed this game and damnit I deserve something. 5/5 Difficult, sure. Nowhere near impossible. Great game.