to get the 10 second wheeleie achievement use Mr.C and just go slow by tapping up + right really fast alternating between them. Don't go too fast. Even if you go slow it will still work. try it at the beginning of the level.
Beat it and got the hard achievement. Took a few tries though. to make the hard achievement alot easier, just pause it when the level is still loading, you know, when it say but is the level over? just make sure NOT to pause after level 27(in between 27 and 28) because that is the zoom in stage and you cannot un-pause it. if you do, refresh the page.