Board Thread:Geometry Dash Gameplay Discussion/@comment-29904938-20160417192810/@comment-27080660-20160418145304

At 40%,  it takes timing. Once you figure out that you need to have the top cube jump before the bottom one lands, that part is never hard.

As for the second ball part, yes, that part is hard- UNLESS you know the pattern. Basically just time a few switches correctly before or after the top/bottom ball hits the ground. and then you're in the clear.