Free levels are only a small portion of the game, and if you find yourself stuck on a level youre REALLY stuck on that level. Folding mechanic is beautifully simple but also sadly limited - you cant fold just one ear of the dog, for example - and occassionally lags terribly when you have three or more layers of paper being folded. For all that though, it seems a very well-made puzzle and I wouldnt hesitate to recommend it as a pleasant means of killing a few quiet minutes.
MadKingSoupII about Let's Fold - Origami puzzle game, v2.0.2