Thank you! That's actually interesting that you did that. I was kind of worried that players wouldn't necessarily realize that the demon head was something to avoid (Which since it's an insta-kill is kind of an issue and could be a source of frustration). It seems like, from other people's comments, that this ended up not being too much of an issue. But I think were I to do this again I would only have the head's hitbox activate and begin chasing you after you left the last room- so that the player had a few seconds to understand how the treasure they picked up affected their movement before having to run.
Regardless, thank you for playing! I'm glad you enjoyed it.