This was an interesting twist on an old favorite at first. Then I got to the coin stages. Why would you replace the logic and timing style with near pure luck? This was my least favorite of the series.
As soon as I upgrade to the 4th tank, the turrets stop turning and the bullets stop moving. Its strange because the non fighters continue to move normally, the small fighters are frozen, the big fighter moves slowly, but leaves behind previous frames, and all keys are responsive. My whole browser soon starts lagging, and when I try to leave the bubble field, I get frozen even though the non fighters are still moving.
Have you removed the pin from the back of the cab? Have you raised the pantograph? Switch on side click several times.