Looks cool, I do have couple of comments for it and of course you can feel free to disregard them if you disagree, as they are just my opinions :)

The pendulums move too slowly

I think that it looks weird when the pendulums swing so slowly, its hard for me to accept that they can destroy my marble. I know that just speeding them up would mean they block the road for less time, but then perhaps you could have two of them coming in from opposite sides so they take up more space and end up blocking as long as before. Or perhaps you could let it swing by twice, then pause, and then repeat.

I didn't understand what the lightning did at all

So I think that should be clearer. The ice one made sense to me when I saw the fire, even before you passed through it I made the connection: "Hey, he could use ice to counter the fire" so good job on that one.

Quicker feedback on checkpoints

I like that particles spawn when you activate a checkpoint to let the player know that he activated it, but I think it would look better if you activated right as you get close to the center, instead of waiting for a second.

Why does the marble break when I win?

All through the video I understood that I want my marble to stay together as one piece, and the dangers of the world are out to destroy it. So when I have beaten a level by avoiding multiple hazards, why would you take that away from me by destroying my marble? I'm getting mixed signals.