Some levers can be activated twice.
I can't get to any levers in that level.
Have you tried killing yourself with J and floating to the island on the right?
yea....then what? I can't shoot the lever. the rock is in the way
You can jump up the floating island and shoot the lever from the top left of the island.
I can't go under the floating island to get to the other side so I can get up there. It's that first rock under the island I can't get past, no matter what form