Start Chapter 23 from the menu (the penultimate chapter). Use the gravity lifts and time your jumps to navigate the H and follow the rope down to the O. Run right. In the next area, jump and hit the gravity lift. It's best to move the box so it's on your right, that way there's no obstacle between you and the wall to your left.
Hit the gravity lift and move left, immediately dropping down to the hidden area. Pull on the box in the corner and the orb will drop out. It's tight for time but as long as you're quick enough you'll get it.