That was excellent!
So, I went onto Newgrounds to see if there was any good music to listen to. Then I saw Flashburn and I knew I would be pleased. My brother (Sebby_man) showed me your music a while ago I really like it, especially Crimson Keys. This song is just as good, if not better.
The notes you chose for this song were VERY good, especially in the beginning. I just love the way this song (and many of your other songs) progress. I especially enjoyed the instrument that came after the second cymbol roll, it reminded my a bit of XsToRmEr (I think I got his name wrong).
Also the mastering was very well done. It must have been hard to lower and raise the volume of the siren and the rest of the song so they sounded good together. The panning was great too.
The only problem I can think of is the siren. It might be a bit too loud at some parts.
Good luck on your future songs. And did you know you are on the Newgrounds audio playlist in the NG MAG section?
5/5