It's alright.
I normally do not vote low, but I've noticed one thing right off the bat that would frustrate me if I wasn't already frustrated at the moment... and that is the 'killing force' as I'll call it, in this game it's the avalanche, in others it's lava, etc. You defeat the purpose of using the rocket boosters that aren't used for jumps if the avalanche can suddenly speed up to the same speed you go so that when you stop it's already right there again. Doesn't give a lot of room for error should someone miss a rocket in the midst of a boost. Consider revising the speed it moves. Other than that, it's a decent time killer.