It's a cute little game, but it's not much more than that. The graphics are real simple, as is the concept of the game. Stay warm, and get from A to B. Instead of having one separate Help page at the beginning though, I'd suggest having something more similar to a tutorial level, or a little hint when a new obstacle appears, like water. A simple "water will freeze you instantly" or something like that.
The difficulty curve is pretty good, the game does get progressively more difficult. I don't like the fact that as you move from one screen to another you'll sometimes end up running right into the water. Takes you a bit by surprise. If you could make this a 2D scroller I think that'd help out.