Sound: Mixing-wise I don't hear any glaring errors or mistakes. Sounds pretty decent to me, any suggestible changes would be out of personal taste.
Composition: Not a bad composition, a nice use of second intervals to create the "creepy" feel and the addition of the random high pitch tones helped with it too. Song structure-wise it works to keep the song from sounding too repetitive.
Fit to Art: Here's where I think this piece will take a hit on. Out of the entire song, the intro is possibly the part that best fits the art. Everything else after that sounds much too fast and rushed. Which can fit a "being chased" scene. However the feeling conveyed isn't one of being chased by something creepy, but more of just running intensly.
Originality: As some of the other reviews on the song have noted, this song isn't particularly original from the "Go" sample to the generic synths that have been well overused and aren't being used in any particularly novel way now. Not a bad thing if you're going specifically for that style.
Ending thoughts: A solid piece on its own, and the art paired with it sets a great start for it, but needs more.