Well I just got around to playing it for the first time.
The game is too slow paced. I probably played for over an hour and only played 3 levels. The first two were really easy and the third suddenly became very difficult for me. It was a long, slow, agonizing defeat.
Every star produces the same number of dots per second, except some stars can be upgraded to produce more per second. So really it's mostly just a matter of having the most stars.
I think I prefer Eufloria and Galcon. Eufloria has nicer visuals and more strategy (not all "planets" produce the same thing). Galcon is faster paced and has more strategy (larger planets produce more ships, but might cost more ships to capture).
Aurora is a decent game, but not on par with the games that inspired it.