The new (/ported from iphone version) feature of highlighting squares you can invade is working nicely, and I very much appreciate it while playing! I also like the wooden window frame and water effects, they look real nice.
I found the map a little hard to 'read' when it got full. I think this is because the graphics for buildings, men and trees are so 'tall' - they're nearly as much in the square above as in their own. Maybe it would be easier to read the map and click on men if they were placed lower in their tile, or shorter, or scaled smaller?
I played the first Island on very clever and the AI was good, but I don't have any detailed feedback, I just don't know the AI well enough

Anyway, since it's a beta I should also mention, I didn't encounter any bugs or crashes either.