You're on your way to a not bad quality game.
Something your should know:
If you hold to shoot for the turret and then switch to tank, the turret is still animating, another thing is if you switch back you continue to shoot without clicking.
nice start ^^
two things you gotta be aware of
1) when the tank drives to the turret, it disappears UNDER the turret
2) if you stand your tank next to the black block and shoot in his direction,the bulett cant be seen and the explosion is on the other end
have fun ^^
On your way
This seems like a good starter for a bigger project, or a demonstration of a vehicle you have created.
I would love to see this in a larger game soon.
But, let's face it, in needs content before it has any place on the portal.