The animation is really smooth, graphics are great.
Some suggestions:
-Slow down the tower rotation from left to right, it looks really quick.
-You should had a little recoil when the gun shoots. (this could be a trick when you shoot down while jumping)
-The smokes when you fall to the ground is nice, maybe add a quick screenshake to give a sensation of heaviness to the vehicle.
I don't know if it's a test but there is rain falling inside at the entrance of the cave.
You work on this game since more than a year, I hope you will finish it one day.