The level where the green and white are locked up. After they get freed, I tried to get the white to push the white button, but it doesn't seem to do anything. I'm not sure, but I retry a couple of times. I hope this help with your concern.
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Hmm, I think you're supposed jump on the orange player and get to the button then go straight down where white blocks get freed so you can enter the next area. /Well that portion is more like a bad game design so I just recommend pushing the white player all the way to the left ( so the white button is not pressed ) and then go down then the white blocks will be free.