Good concept and I enjoyed playing it at first. But then I constantly had issues where after a round or two, I would select the mission, select difficulty, and then wind up on some blank grass field with no options. I could hit pause and go back to main map, but then when I tried again it was the same field but now with the menu overlayed on it. I was having to reload the page ever 2-3 rounds... Got pretty irritating so stopped play. Otherwise, decent game and idea.