Walkthrough :)) as if it needs one
The game is way too easy but other than that, i love it :P
-> Build Bunkers (fortresses later on) in the front line and upgrade them to the max
-> Build ONLY anti-tank turrets in the bottom...as many as u can
That's it! :)) I finished the game like that without even starting to worry
PS: In the last levels you will have lots of money to spare but my advice is not to send reinforments as it would only make the round longer. You can finish faster with your turrets :))