How do you beat level 11 on red ball platformer

You go up to the second floor, then go on that button that makes the silver platform move. When the platform reaches the gap go and push the wooden block on to the platform. When you have done that go on the button and make sure that the silver platform has touched or is close to the 1st floor. Then push the block onto the floor and then push it on the other silver platform that takes you to the second floor. Quickly, but carefully push the block on the button, go to the gap and wait for the platform to appear and jump (or wait on the first floor for it to come back). the platform will keep on moving allowing you to collect all the stars.
It will take a few tries, but it will work.