There's a problem with the stairs in Deathwind Chapel. (The secret level in episode 3.) You hit all the switches in the lava room, and when you go back to the first room, stairs have lowered to a room with a deep pit. There is a pillar in the center of the pit with a platinum helmet on it. When you jump on the pillar and grab the helmet, stairs are supposed to rise that should join the pillar to the entrance of the room. Instead, each section of stairs rises and then immediately drops back down to the bottom of the pit.
It's not the end of the world, though, because you can still jump off the pillar and make your way back around to the entrance of the room. I just thought I'd mention it in case you feel like fixing it.