Wait, what do you mean there is actually an NPC? oh dang it I have to do the whole boss again! (it might be fun), you could definitely add a "warning" to stop players to actually go to the far right and "stop the game", as another fact I just remembered, I find the boss quite enjoyable (besides the issue with the dagger combo) but there is just another thing I just remembered that kinda got me stuck at the caves when I had to go through the narrow passage, and that is the "ground dash" action, I'm not sure if I did not saw that at the beginning, but technically speaking it is not intuitive unless you are trying random stuff, and thus I think it would be good if it was also an input shown there, and ofc I think it would be great if you could actually move while crouch, but thats just me.