Taken from a Q&A with the producer Nour Polloni, about the achievements in the 360 version. No word if this feature will be in the Wii version.

Another achievement is linked to whether or not the player skips. We want everybody to be able to finish our game, so one of the other new features we’ve added is the ability to skip sections using a DVD-style menu if you get stuck, but always at a cost, and achievements is one way to reward players who don’t skip.