Hmm...
A good concept, but intolerably buggy.
The pace was good (while it lasted) and the unit types were clearly designated and well thought out, the missions were also quite fun, to a point.
Unfortunately.
1. I found the controls to be sluggish, and often wholly unresponsive.
2. Unit pathfinding was, to be completely honest, atrocious:
a) Units were constantly finding themselves stuck on the surfaces of planets.
b) Units frequently ignored commands and went in whatever direction they deemed fit, usually directly forwards, often for the entire length of the battlefield before finally turning and heading where i sent them.
c) Units flying past buildings instead of stopping to fire at them.
d) Units randomly deciding whether or not they wanted to fly through other units (i'm not entirely sure which instance of this you intended)
3. The game became VERY sluggish once more than a few units had been built, i rarely even needed to reach half of my unit allowance before the game slowed to a crawl, i know my computer isn't top-end anymore, but i see very little in this game to explain the slow down, other than inefficient coding.