The game starts without mouse capture so when I saw the turret moving on its own I thought it was following the cursor while I was using the gamepad, turns out the tank auto aims which is always lame.
I like the models I think you did a good job there.
Some thoughts on each phase:
I prefer moving tanks with the D-pad (or keys) because they are able to pivot on the spot.
Your tank struggles with this, it looks like its rotation rate is linearly dependent on its speed, maybe it could have some higher minimum value for pivoting. It also keeps moving forward or backward if you hold A or D.
Gameplay-wise you're moving around and spamming sluggish auto-aimed shots, not very interesting.
The helicopter controls fine, I prefer when helicopters have a throttle since that lets you do tighter turns.
The plane physics are really forgiving, you can slow up so much that it basically hovers on the spot. Still, timing strafes and avoiding missiles was more fun than the "throw off the enemy aim and hold the fire button" gameplay of the other phases imo. Tanks are a menace even when you're flying at max speed which is funny.
It was neat. Not having to aim and the overly simple controls didn't grip me but that's personal preference.