I know everyone's having a really hard time with level 22, and I figured out an easier way to beat it than the walkthrough suggested. Skip the green switch and press the red one, then bring the balloon plumber below the green blocks and into the little nook of them. Then go press the green switch with the regular plumber and continue the level as you normally would. + if this helps :D
A good strategy that I use is to put 1 magnet on top of the coin collector, 1 speed panel, and put all of your weapons on top of each other in the front center.