This is fantastic!
Really clean UI, the multiple camera options are much appreciated. The skills are cool, and the ui to upgrade them works really well. Really like how you've organized all the UI.
I noticed 2 bugs: Once I equipped the iron sword, I could no longer attack, and when someone _else_ equipped a weapon, I could see the world widget for that widget following them around.
Other than those 2 small things - perfect. Really, really love this. I think the global kill requirements was a stroke a genius too.