Great music and theme. Major points just for the title alone.
I found the gameplay a bit frustrating. When you jump, you lose sight of the floor and so are only guessing on where you should come down, whether it is on an enemy or not.
Also it may be just a glitch on my end, but often I would be in midair and then the camera would fling backward and my character would disappear. I think I was taking mid-air damage but it was very difficult to tell.