Been done many times, but not bad
Well this is a pretty cliched remix, but hey, its one of the better ones if you ask me. I'm no expert on the original song, but I think the melody sounds more sticatto, while yours was a lot smoother.
I agree with barnezy a bit about the strings. I didn't care much for the strings... or the lead synth either. The main beat going on was great though. That break sounds pretty familiar. Although it doesn't work good in the beginning when its slow. Also the glitching around 1:58 was pretty lame. But, I liked the stops around 3:10.
I think the main problem with this song is that the synths and pads, whatever, overpower everything else in the mix. Try playing around with volume on the leads, or do something so the drums are in front of the mix more.
Good remix, it was pretty interesting. Just work on it a bit more.