Awesome! :D
I like the reaction timing the most, it's very creative. I am very torn about what this needs though. Part of me says "Add more ways to kill! Add some elements with your surroundings!" but another part of me says "Keep it simple! Don't overdo it and make it cliche!". So I'd have to say i'd like to see a little more ways to kill, but not too many. It's awesome as is, and I love the combat animation. A sequel is definitely needed. ^^ keep up the great work!