So, the game made me want to pierce its secrets, and to understand perfectly how it worked. The music, sounds and voice actings really added to the game, but the tutorial was REALLY confusing, and it would have made the game clearer to have each explanation on a different page, or added text to understand. The principle of having one slot, building and demolishing building doesn't really fit your game, it would have been better if all buildings were there, but only one could be active each turn (since that's what reflects reality: you don't have any cost to build or demolish, and buildings stay at the same level once you upgrade them).
When you finally figure out the mechanics, the game is pretty simple, and you want to figure out the best way to proceed. However, the mechanic of GAINING soldiers based on the difference with the ennemy invaders make for an exponential increase once you reach level 5 on each building, which you can do really early since you can upgrade multiple times in one turn, and the mine gives way too much. Once you reach the point where your soldiers combined with the difference with the enemy are always greater than the increase of enemy per turn, you litteraly can't loose, and can spam freely the wheat generation.
The game then crashed at level 100.
Good game overall, but it would have GREATLY benefited of a more understandable tutorial, a few balance tweaks, and maybe a few others things to do on the side to keep being "on the edge".