Thanks! Are you talking about the dark mazes in the red castle or the top room of the castle with the torches? The dark mazes light area flickers so you can see the item you're carrying (player0 is always displayed over player1). In the rooms with the torches, the walls change colors from light to dark for a "torch effect." Was it one of these two things? If so, they're part of the game.
The top room of the castle with the torches. After I took the chalice into the castle, the entire game was frozen/locked. Nothing would work. I thought since I had brought the chalice into a castle this might be the end of a level. It looked very nice, but I had to reset the game on the console, instead of going to the next level.I am going to try it again and see if I can repeat this, and find out exactly where it is.
Excellent game!