Finally! A rock song to review! This one is a diamond in the rough. I've listened to it three times now. The theme is mean and has attitude. It's upbeat and you clearly know how to play guitar well.

Pros:
+ Good overall structure. I could really picture someone being able to sing over this easily.
+ Yes, that main theme/riff is sweet. lol
+ The section at 1:55 is great. My favorite part of the song.

Cons:
- 0:26 needs a better transition. Something seems off there. Transitions as whole in the song seem to need some work.
- I really disliked the guitar tone. I do however understand it's a demo and likely scratch tracks.
- Along the same lines as the guitar tone, the drums sounded really flat and out of place.
- The fade out at the end seemed unnecessary and it might have sounded great to end it with the punctuation of that riff rather than fading out. Leave the listener wanting more with a statement, don't just fade away!

I really like this as a demo track. You should be proud of the potential this has. Keep working on it and always pushing the boundaries. I think this could be really good with some work. I can't wait to hear it as a finished product. Good job. 5/10