Thank you for playing and for the feedback!
Basically, wrath buildup causes you to die, and you have to use stamina to cleanse it by focus firing your weapon. I avoided using a death screen and went with respawning the player after their death, and sometimes I don't even recognize that I died lol. With the player character teleporting, maybe you mean the dash mechanic? I haven't run into that before but that could possibly have to do with collision with the boss character. I'm planning on removing the auto jump so you only are jumping when you choose to with Space, and also possibly reworking wrath into something that activates the hyper fire instead of just never having control. I didn't think wrath buildup -> death was very healthy after seeing a few people play through the game.