Interesting game!
I thought the graphics were great and very detailed. The AI was pretty well done, except for the end of the mission when I had about 20 fighters all in one group, but none of them shooting. Sounds were pretty good, but when I had a ton of units on the screen each of them were making noises and it did become overwhelming where I ended up muting it. The UI was sharp and the layout of the beginning screen looked really good. The popup boxes were freaking out on Safari, but after I was done playing, I loaded it on Chrome and they seemed to work properly.
The tool tips looked good, but they used terms and language that someone who didn't work on the game wouldn't know. One of the tooltips said "Drop the node into the factory circle slots" and since I didn't know what the factory was, I dragged "Gatherer" all over the screen until I randomly dragged them over what must be the factory circle slots.
I think with a bit more polish so the player knows what to expect, it would be a pretty cool game. Well done!