To those who are having trouble with cosmic monoliths, you need to have dark resist gear on. You can, with a bit of gear levelling, make it so Nat absorbs (heals from) the dark-blast that keeps wiping people out.
My only complaint is that with 3/3 money over time you lose money if you call a wave early. (with 1/3 you still earn money, with 2/3 it doesn't matter either way)
I would personally like to see this game use a frame counter for time instead of timing (if it doesn't) I have a crap comp, and I can't get any of the speed achievements, even though I'm spending almost no time building and have about 3/4 of the damage/fire rate improvements...
For those complaining about fuel, you get a refill when you level, that's the point. Once you have all 'enemy' upgrades, you get infinite fuel to get the badges. Seriously people, it's not hard to figure out.
@Matsteo: they're ones as they rotate, it's part of the gag, I thought ^_^
Amazing game done in one go. Difficulty is appreciatable, and the last level and dialog almost made me shed a tear.
absolutely amazing.