I just got to a point where i had one collector, 3 melee guys with full upgrade weapons, and me with a full upgrade machine gun shooting the box and collecting. Gets about $3000 a second, so it's slow to get the nuke, but I'm lazy.
Really, the only thing that kept me going was the fact that I could click that button. And that when I finished, I would have the satisfaction that I wasted my time.
Great game! If I could, I would give it a 4.5 but I gave it a 4 instead because of the jumping physics. The second cave with water was rather difficult to climb up. I got to the very top 4 times and fell in the water at a badly timed jump, and had too start over from the bottom.
Otherwise, awesome sauce game bro! Loved it :)