Player 2 : Use the wall to your left and at the ceiling in the top-left corner of the room to create a path into the maze.
Player 2 : Wait for player 1 to drop the crate in front before dropping off and waiting for the next crate to move.
Player 2 : Stand on the left-hand crate and wait for player 1 to step off the switch, causing the crate to raise upwards. Now pick up the Displacement Cube and wait for player 1.
Player 1 : Set a portal on the right-hand side of the wall near the exit and the next portal on the wall panel up to your right.