Well done on making such a polished game, but looking at your other games that you have made, It seems to be something that you are very good at. When I first started, I had a flash back to the game North vs South, charging around guns a blazing, unfortunately I was very good at it.
***Edit***
I went back and played again, I found my approach had been all wrong, I went into trying to kill all the armies, In fact you just need to discover them, A true spying game! I love it. I would like controller support in an update.