Not a bad effort

You were quite accurate in notating out the song from the original, and the use of guitar pro's electric guitar was an interesting choice, however, if you're willing to invest time into making music, there are better programs out there, you just need to ask the right people and learn how to use the programs. Also, covers, to me, really need to stand out from the original, and add a whole other dynamic element to the song that was otherwise absent in the original. It's not that you're trying to make the song better than the original, just that you're trying to add your style from the same skeletal song structure.

Overall, you did at least manage to capture the essence of the original, and attempt to add a new layer to the song through your choice of instruments. Not the best, but certainly not the worst.
Nice work, for that I'll give you an encouraging 7/10 and 5/5.

Not too bad.

Sounds good enough to be used in a flash game. It worked pretty good with the game that you made and you used it in. I liked the variety that you used in the song. You first started off normal, really slowed the submission down, and then really picked up the pace again.

Could be cleaned up a little bit though. I think it would sound a little bit better as a loop so I wouldn't mind seeing you getting it to loop well.

Not feeling this

Sorry dude, I'm not feelin this, the low quality midi is great for what it is as a low quality midi, but when you use midi to emulate real instruments it really takes away from the song and I personally tend to think "wow this is really crappy midi" instead of enjoying the melody. It sounds like you have an ear for music, you just need to step up from midi.

Don't give up, you'll slowly but steadily progress =D

A metal transformation for the ages

I like how it starts off basic midi style, slows, then suddenly thunders into metal. The transformation should be just a little slower, though, not just "taptaptap" then wild crazy drums. It could work as it is, though my personal preference would be slower.
Slow down the drums to human playing speed (unless you intend for it to sound like a drum machine and not a drummer), and extend the metal outward for another minute or two. The rockin' cymbals and drums are good, if you get really crazy add in a bass guitar.
As a short, almost demo-ish, track, this is almost golden.

good

it would be better if was longer