4,474,000 w/o 5 hour medal. First 2m only on tank/rocket/golden gun, next 1m on about 60 nukes, final 1.4m on golden gun reload. Got a reload right at the end too, but I hit a spike...
Great game! Cool physics, and fun to try to get the timing just right. Maybe a bit easy though, and the 5 shot limit should be removable when playing through again.
Also, beat the last level in one shot... not sure how I did it, pretty sure I couldn't do it again, but it was sweet. Too bad I'd spent an hour or so trying to get it down before hand.
34 days... great game!
I got it by keeping my altitude fairly low and using my speed to keep me going about 150 to 200 mph, I was still going about 125 when the screen turned white and I finished the game. Took me about 10 tries to get that last one... of course, that is now one rich penguin!