The trick is to keep the mummies from walking across them.
First, move to the top. Move the mummy out of the top pen away from it, then put yourself in the pen to take out the orbees. Be careful, because this mummy will go straight toward the bottom of the screen, and this will kill you. Quickly pull yourself out and put the mummy back in. Then put the rest of the mummies into the top pen, and use the grabber to drop you onto each orbee and back out again. When you finish, go back to the start to finish the level.