You can get this achievement early in the game. It was my second achievement, but considering you can jump from the beginning of the game, maybe it could be the first achievement you unlock. (Confirmed by NiteJokester). I did this in front of Papa Smurf as soon as the conversation that unlocked me Flower Power finished.
In order to perform perfect jumps all you have to do is time your jumps correctly. Press
to jump and as soon as you land press
again. You don't have to move, just keep jumping vertically. Is not that hard to get the timing right. You will see a flash and hear your smurf saying things like "Awesome", "Yeaaah", "Great" and "Yippee". A counter will appear under your smurf if you are doing it correctly. Once the counter gets to x10, the achievement will unlock.