Thanks for the feedback!
I didn't want to have physical combat between the character and the enemies because I thought it would be too chaotic and hard to handle. I prefered taking a more platformer-ish approach.
About the particles it's actually world space right now, it's just that I apply an orbital movement so that they spin because it was looking awkward otherwise. I tried different things to make it seems good but didn't find a better option than this that trully gave the spinning sensation.