Thanks so much for playing and advices.
Yes, I am lacking good visual effects. I am trying my best to learn how to do them properly. Blood effect is unsuitable because the player's blades already drain all the blood, but I will probably add some white blade slash effects and maybe a different sound when you hit someone.
Rewarding for killing is an interesting idea, dunno how to do that so far, but we will see. I definitely plan to work on this game further, I have more ideas what to do :)
I also want to "cultivate" the movement a bit, it's still kinda buggy sometimes.
Thanks again for help I have a lot of things to think about ^^