In the last three days I've almost continuously played this game and I got a couple of restaurant shots. I'm far from stable though so my addiction is still there.
I just got to the 300 mil, after about 3 hours.
Zero nukes used.
My trick is: shoot at a 45 degree angle, and let the turtle bounce, as soon as it stops leaving the screen hit it with the golden gun, repeat.
When hit by a bigbird (sending it to space but lowering speed) hit the rocket.
When you get down low, use WASD to try to get helpers and extra bullets, if you get extra bullets, just do what I just said.
I got to the 3 million needed for the hard badge (without using nukes btw.) but I didn't get the badge
in fact, I didn't get any badge
god f*cking damn it, BUGS