Not sure where you are stuck Cathy but .......... I'll write a complete spoiler seeing as though it is you
The three Dudes don't move a muscle.
Switch to Peegue and push green sphere up into water.
Push both metal boxes into puddle.
Fast fingers - follow circling green sphere around and push barrel left in puddle.
Push other barrels in lower section into puddles.
Push remaining barrel in bottom section left over tramp to blast some spheres.
Push cannon round ice and through top tramp by black/white TP's.
Tramp into sphere section (fake wall) using the unused tramp on the left where the cannon was originally.
Push yellow sphere down, take coins, push blue sphere down and push red sphere up to tramp over cannon. Follow it but watch out for cannon fire.
Voila and thanks for playing and sticking with it x