Not bad (I like the graphics and especially the big knife), but the game was much too short and too easy (I think I completed it within 20 minutes). I think it was a nice idea to change the gameplay in the middle of the game and include a kind of "Guitar Hero" level. But the execution wasn't that good, because you can't rely on your rhytm (which is the best way to play "Frets on Fire" or "Guitar Hero"), but really have to look at the notes instead. And it's also hard that you can't play this level with one hand, because of the key configuration (would have been much better with A,S,D,F as keys).
I would like to see an extended version of the game with more levels, some difficulty settings and some technical improvements (AI and key configuration in level 3 for example).