Well, that was kinda weird, but I'm glad I wasted an hour or so on it, and would gladly do so again. :-) I especially liked the familiar music (Ran 5, Prep).
My only real complaints are the fact that there's no timer to compare yourself to others with (or see how much time I wasted :-) ...) and the fact that the HP turns red too early; I think that should be yellow at half, and red at a quarter, because at half you're still alive and kicking. Usually.
Anyway, fun stuff. I look forward to seeing more in the future.