Great game. I think it is a lot of fun. However, I think it should have a little more depth to turn it into an even better game. You should be able to manage your lineup, maybe create your own formations, etc. Also, maybe consider adding another element to the actual gameplay if you make a sequel (which I hope you do). 5/5 great, fluid graphics. I also like the physics involved (with friction affecting speed and tackling power).
I love this game, despite some flaws that make it easy to take advantage of. I can't wait for the sequel, but I agree with dannyboy when he says an extra layer of strategy is needed. After advancing to the final age I put the most advanced turrets in all four of the turret spots. I then left the room and did some work. When I came back I hadn't lost any hp and I had about 1 million of the currency units in the game. I then just built a bunch of super soldiers and wasted the enemy. Yes, this does make it pretty easy to beat the game, but it was quite fun doing that. 3.5/5
Monkey, I've had the problem where you can't shoot, also. To fix the problem, press 'Esc' to bring up the options. Then press "Resume" and you should be able to shoot again.