Thanks for the feedback. I am really glad you played and enjoyed. I actually dropped it from 100 kills to 50, but 20 would be enough I guess.
Before that, you can level up with exp and increse damage as well (health or defense too if you prefer :D) (press c for character stats)
and when you die and click "more blood", you just teleport to the village center and nothing is lost :D , you can continue the quest :)