I just got both the impossible badge and the hard badge by balancing my bricks, meaning same amount of bricks on both sides. But once I got to 14 bricks left, my platform wasn't big enough to balance my bricks, so I just stacked the bricks one on top of another, in one or two columns. The funny thing was that my tower didn't even start swaying until 6 bricks left, and by then I was just holding down the down arrow. The impossible badge only required that you had 99 bricks on the screen at once by the time you finish, and my tower was so high, that the bricks didn't have enough time to fall to the bottom. +90 points for me :)
omg!!! I didnt know there was a bonus, so i just stalled with the last guy
Than when i beat him w/ 17 green giants, The boss popped out... It was okay until the screen suddenly turns blank and i realized i forgot to save ^^ (1.5 hours wasteede)
 "99 Bricks"){kind=icon}
 "The Great War of Prefectures"){kind=icon}