Playability:I like the night/day cicle.Good playability, except some spelling mistakes.I only wish to have longer scenario.
Balance:Good Balance.You balanced well that fixed cannon hp.
Creativity.I have nothing to say except I love your creativity, only that every part of scenario have more objectives.
Map Design:You created scenario on one map and hide taht with hide minimap trigger to don't confuse player.(Or to create an ilusion of campaign or to we don't know where all of our units are)Anyway I liked the Boston map part and.The fort part is enjoyable too.Only what you miss to get 5 from Map Design is some more eye-candy on fixed gun part.
Story/Instructions:Nothing besides objectives or "Leave Boston NOW" saying.Very bad.The objectives are only thing that gave you 2.