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Use arrow keys to drive the tank, or...

A: Left Track Forward                      K: Right Track Forward
  Z: Left Track Backward                  M: Right track Backward 
Space: Fire

S: Zoom In           X: Zoom Out           P: Pause

3: toggle 3D CinemaScope on/off (requires 3D glasses)
Fullscreen                                                                           Download

What if it doesn't work... ?