I had quite a bit of frustration with this game when trying to 100% it, but halfway through when I gave up on that I had a much better time. Still, I don't think a lot of the design was the best. I think a lot of the learning was done by trial and error instead of intuition. The bear riding and jetpack levels were particularly bad. When going for 100%, having to run backwards along a split path is very annoying, there is not enough camera view to make that reasonable.