The Wonderland Board

I got all the wizards over to the other side except one. The orange one.
He drowns when I get purple one across and he steps off the rainbow
button. Any help appreciated

You should probably get Doondilf (the orange one) across before you get Cedric-In-The-Morning (the purple one) across. Or, simply, throughout the whole level, instead of doing them all together, just do one at a time. That way, you have less to manage at once.

You can get rid of the rainbow bridges by popping them if they are in the way.

Thanks, that works.