Wow!
A vast improvement over your last flash, Log!
(I watched the full version on your site)
*SPOILERS AHEAD*
In my opinion, everything was done greatly, but I felt bad when the Green marine died ;(. He was cool, with his Dual Rifles.
Anyway, the ending fight of the episode was great, the Terran and Protoss against the Zerg, and then the Zantaboan at the end. Another cliffhanger at the end.
Oh, and the two Dark Archons seemed a bit... Small? I mean, they were as tall as the Marines! Great job on the overlords this time -- they have faces now! As well as looking a lot more menacing. I could really get the feeling of how they were directing the Zerg Scourges.
The mutalisks were kind of ugly, they seemed like a bunch of shapes stuck on each other, but I'm sure your next flash will improve a lot on that!
I also enjoyed the Zantaboan Chase near the middle of the flash-- Great job on that.
Nothing else to say, except it was freaking awesome! I can't wait for the finale!