Actually not bad at all. This is a really good piece of music and it's clear you spent a good bit of time with it. The only reason I gave it 4.5 is because that sort of "whistling" lead that comes in at 0:50 didn't sound as pleasant as the rest. It would have sounded better if you replaced that with another shaped lead like the one you were already using. Other than that, it's a really solid piece of work!