Fly Hard is a ~643 variation of the same game but its music rocks, difficulty is just perfect to have fun while trying to improve results without frustration and it has Homer Simpson trying to save the world :)
"Undead Daydreaming" is probably the easiest hard badge on Kong:
Rocket launcher is the king up to level 11. For levels 12 - 14 switch to flame thrower and you're done :)
I did it in 17 days :)
Tips for the hard badge:
use elderboy's hints for the first 5 days.
do achievements in pairs: height + time (generally easier to get, especially time), speed + distance.
height + time: after reaching the height limit try bending slightly towards water (you'll know that your angle is right when your speed doesn't change and altitude is dropping really slowly).
speed + distance: the best method for reaching long distances is to gain critical velocity (to unlock speed achievement) and immediately drop to 75% of it and maintaining near constant altitude and speed afterwards (with angles 2-4% and using rocket sparingly).
it's more profitable (and easier) to achieve height + time on new ramps than speed + distance on previous.
think twice before upgrading if you could save the money and buy better glider/rocket next day (caveat: if upgrading allows you to succesfully attack new achievements and gain profit then it's worth it).
I did it in 17 days :)
Tips for the hard badge:
use elderboy's hints for the first 5 days
do achievements in pairs: height + time (generally easier to get, especially time), speed + distance
height + time: after reaching the height limit try bending slightly towards water (you'll know that your angle is right when your speed doesn't change and altitude is dropping really slowly)
speed + distance: the best method for reaching long distances is to gain critical velocity (to unlock speed achievement) and immediately drop to 75% of it and maintaining near constant altitude and speed afterwards (with angles 2-4% and using rocket sparingly)
it's more profitable (and easier) to achieve height + time on new ramps than speed + distance on previous
think twice before upgrading if you could save the money and buy better glider/rocket next day (ceveat: if upgrading allows you to succesfully attack new achievements and gain profit then it's worth it)