The sand walls don't always block the lasers. Getting hit once starts the whole process over. Is anyone else having the same problem.

You have to wait to hit the crystals, i got stuck there for a while too. In order to hit the last one you have to go down and wait for the lasers to catch up, then hit the crystal so you can go up there and hit the final one.
Im used to go as fast as i could on plataformer games before, this one you have to wait.