The game is practically divided into levels. Be the British for an easy run, the French for a somewhat more challenging, and then the Prussians for a challenge. The enemy isn't a huge factor, but it seriously is hard with the British attacking when you're the Prussians. Dang grenadiers just won't reach those Greenjackets.
In the achievement A Father To His Men, it's too hard to get the achievement, and the reward is just not rewarding. Repairs are only 50 max, for god's sake! What does free repairs matter?!?!?
creative game. A little break from the normal tower games. Think Prussians can be a little better though--their grenadiers have too little range. Other than that, great!