Yes you're right. We will keep you up to date though.
We've made the turret a bit slower and added cannon fire. Collisions and explosions are next on my list.
If you look at it carefully you can see that there is a kickback for both cannon and tank when the cannon is fired.
Download link:
Tank Battles V1.0.0.3 from 13-Jan-2011
I've made a small video which shows more than a simple screenshot: