I'm not familiar with the track (never really got into Freddie's solo stuff), so I can't comment on anything you may have done to the actual song part, which sounds fine, but could benefit from some proper drums, in my opinion.
If I may make a couple of constructive points, the first one being that you would get a much better end result by encoding the MP3 at 192Kbps or above (I usually do mine at 256Kbps). Admittedly, this increases the file size, but 128Kbps is significantly lossy, as the high frequencies (treble) are compromised, and sound 'wusshy'.
Secondly, the piano part in the beginning is nice, but the cross fade merge into the original song is a little abrupt and obvious (sorry!). There is almost a gap between the two parts. I would suggest starting the cross fade earlier, which may make it less noticable, but whatever you do, it won't be easy with two contrasting pieces of music. Certainly a nice idea though.
No offence, I'm not speaking as an 'expert', just as someone who's been where you are now, and spent many hours of frustration, and hair pulling out, practicing!
I hope your remix flies up the charts! :)
Remember to deliver with the speed of light
A little bit of love and joy