Good overall
Rather well made game, graphics flow pretty well, and the bullets don't fly through the tanks and whatnot that they shouldn't. I was surprised at how easily the Jeeps were destroyed, and once I got to level 20, I just sat back and watched my defenders take over. I do agree with others that 40 is too long, and 30 would be a bit more realistic. It did keep me playing for a while though, so I rank it high as a good game, if a bit off.