Glad you enjoyed it!
Part of the original concept was to play with the "distance" challenge without setting a hard cap or lose condition. The solution was to make the game unplayably bright, but that wasn't enough on its own so I added the sound. It's a pretty effective deterrant to keep the player away from the knight, but obviously it's pretty unpleasant. I have some concerns about it being an accessibility issue, which is why I put in the warning at the front, but it serves its purpose and is thematic enough that I thought it better to leave it in despite that.