There's no blood stuck to the sword, it's just an indicator to help you know which direction you're facing, and it can be turned off in the options. As for your health, right now death isn't coded for the player. I'm not sure what enemy you're talking about bludgeoning you because it's blocked. As for your sprite disappearing, were you in water when it happened? You may have drowned, which makes your sprite vanish into the water.