I had fun. At first I thought it looks reaaaaally simple, and dull but the juice (bounciness, effects, transitions) is there and it's what makes this game great.
However, I have this odd feeling, that the game might be better if the knife/sword was more precise (so it wouldn't be that random) and the game more dynamic to accomodate that. But I know, that it was a deliberate decision to make it so and it makes this game more adhere to the theme and I respect that.
Great job, overall!