Swallow a laser eye and enter the next room where you can bounce lasers off the walls for easy knockouts of enemies ahead. In the next room, climb ladders and watch for cannons. Spin the building outside and a door will reveal. As you scale the next area, remove 2 blocks that reveal a door and you’ll find a green switch to press. After a set of stones, the next room is dark and you’ll need to swallow a lantern ghost to light up the area. Go through the next door and do some big jumps to reach the goal.