I like the concept, but it has some balance issues currently. The jetpack adds far too much heat, which means you can't always get the air you need to get to the next platform without burning yourself alive. Also, I think the jetpack might work better if you could hold down the button to accelerate upwards, rather than a single burst, because that would allow for a little more control and finesse. Lastly, I think it could use more land, and not just the tiny platforms the snowmen sit on (those are way to small for me to land on!), because as it is, you hardly ever get a chance to cool down.
Keep at it! You're going in the right direction.