"Cross the bridge and then you'll come to a bolder"
Hmm, the only boulder is the one I described I'm almost certain. Personally I can't remember a bridge, (it could be something that I wouldn't notice) all I remember is that from the screen with the Ribbon in it you can get to the screen with the icicles, (by heading up on the screen) but beneath the icicles and there was a passage (I'm almost certain passages between different parts of one screen are green arrows) that leads to a different part of the screen (which is above the place with the icicles) from which you could push a boulder.