I didn't manage to finish it, but what I saw of it was very nice - the style, the music, everything fit together very well. It reminded me of a mixture of Knytt and Super Mario Bros. (a good thing, BTW).
But as I said, I didn't manage to finish it. The last jump in the Ruins kept me trying for a while already; the first one in the Wastes was outright impossible. I tried for several minutes, then switched to easy mode, tried some more, found I still couldn't do it, and ultimately gave up in frustration.
Looking at the previous reviews, I think I'm not the only one who had problems, either. I'm aware of the ski jump mechanic, but I couldn't pull it off well enough to, well, pull it off. (Maybe I'm just getting slow.)
Fix that, though, and you'll have a real winner on your hands.