Not bad at all
The main melody sound feels a bit off, not sure exactly what it is, but your main chorus doesn't to fit quite right with the harmony. However, it might just be me.
I particularly like the part that starts 0:24. If you do ever update this song see if you can extend that bit. It comes back again later in the song which was nice.
Another thing I noticed - I really like that part around 1:25, but then you add all the fast notes that throw it off. It's a very nice melody without worrying about frills.
Overall I enjoyed it. The sound is crisp, it has a professional quality to it, and the chord progression is fun. Keep up the good work Falloffenix.