for the hardcore people, it's possible to get 10 000 points when you maxed everything: stay windmill height and use as little fuel as possible. the trick is hitting the windmills, learn to anticipate them and the trickier part is not hitting the ground.
*ahem*
YYYYYYYYYYYYYYEEEEEEEEEEAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
i got the impossible..the 95 percent one is REALLY tricky, i ended up getting exactly 95. thing to do is go by the rhythm..
Dont try to get the marksman badge with accuracy...just forget about it, and in the later levels, upgrade your firing spread and you'll get it anyways, without even aiming.
Held my interest for all of 4 minutes. The energy/health doesn't recharge after a level? And you can't even buy more energy, so the energy upgrades are useless. Not to mention your money resets after you die, and the little dudes have a hitbox the size of a mosquito on their EAR.