Been playing this from time to time with my wife. It's a gorgeous game, but we're finding it frustratingly difficult. I know some people felt that Little Big Planet's jumping was "floaty," but I never minded it; well, compared to Puppeteer, LBP's jumping had laser-like precision. Controlling Kutaro is like guiding a greased balloon.
You can accumulate extra lives, but the checkpoint system is structured so that you have to go back to the beginning of a section every time you die. To me this defeats the point of having extra lives; if you can't complete a section in one try, all the extra lives in the world won't make it easier. With practice, you'll eventually get it, but that practice could cost you dozens of lives. And that's a permanent loss to your store of extra lives; with LBP, you could practice a level as much as you wanted, and the game didn't hold your failures against you. Puppeteer does.
I honestly don't know if I'm going to finish this game.