Great stuff!
What made me so happy about this was how it kept up how good it was the whole time. From beginning to end, there were these authentic ninja/samurai sounds. It really gave you the feeling that you were going off on some wild adventure. It wasn't scary most of the time, but more of a feeling of wonder. I guess that's where the word "wonderful" came from? There is simpy high paced action and awesome lyrics the entire time around.
You don't know where this thing is going. There are a few pauses with softer music and a few times where the music changes completely. There's little bits of music thrown in for good measure and a great trip the entire time. I can understand why this was used in a fair number of flash submissions. It's great to know how you extended it from being less than half a minute long. The instrumentals keep the thrills up the whole time!