Quite an original game, this. You are cast as defender of a bridge, across which the computer is attempting to march a line of tanks.
From the screen display the bridge looks a long distance away, but is very wide. The tanks trundle onto the screen stage right for every one that manages to exit stage left, you lose points.
To prevent them you have control of a curiously shaped anti-tank gun (what else?), seen in perspective, which is capable of both lateral movement and variable angle of muzzle. The field of fire can thus cover the entire bridge - just.
The controls are sensibly laid out and the display more than adequate, if not absolutely brilliant. The game is definitely addictive and difficult enough to ensure that you will return to it again and again. Just one more try...