Here's a special hint on what I believe to be the secret: The acceleration, air resistance, rocket fuel, and ramp height upgrades. You can buy the later ones without buying the earlier ones. That is, if you have 15, you buy the first acceleration upgrade, the last one is still 10000. The higher upgrades always are worth more. So, save your money and buy higher upgrades instead of one at a time.
6000 feet isn't hard. You do have to have the best glider, best rocket, and need to have at least acceleration and rocket fuel at max to make it (which are all expensive, but I got 28 days my first try and 23 the second so...)
all I can say is, nice concept, but...definitely needs a couple things. like a save. and perhaps a hint button (although I got along fine without one until I got bored)
pretty boring. I mean, you float in space, shooting random fighters with a turret that shoots bullets extremely slowly. I mean, seriously, even Star Wars had better laser weapons than that, because the lasers had VELOCITY. this game, it takes about too long to get from the gun to the ship.
other than that previously mentioned error, the game's ok. Kinda reminds me of a cross between Peggle (with the pinball-type stuff) and that hedgehog game on Kongregate (where you're supposed to send a hedgehog into space in 5 days). but, overall I'd say 3.5/5 game. could be improved.