So, uh, what the hell am I missing with this one? Aside from that horrible spherical bullshit pacifism level, I've found every other level but this one easy to get three stars on. I don't get it. I can do a run where I don't die and kill the enemies fairly quickly but still end up a good 500K or so beneath the threshold for a three star score. The turret and black hole specials are of limited use due to the structure of the level. Surely I must be missing some sort of optimal loadout or something since there are people with scores way over the limit, but I'm not understanding it. Have any tips for me?

And fuck that pacifism level so much, so so much.

UPDATE: So, I figured it out. It seems as though my solution to this game is posting about it here. Easy way to beat it was using the snipe drone, which I'd otherwise always put off as being crappy. It's actually very good for this level. One more to go for three stars on every level.