Really good, this boss was always one of my favorites, mostly because of the music, lol. I like how the opening was from the game directly and then slickly switched to the new instrumentation. You did really well with the percussion in my opinion. The whole thing sounds more techno than the original (although the original was too), keep up the great work! (I actually registered on Newgrounds for the sole purpose of telling this guy he was awesome)
Thank you very much; awfully late but I appreciate your support!
Honestly I was afraid I am getting soft with my music instead of getting better. Be on the lookout for some uhh Re-SURGE-ence in the future ^_^
Please contact me if you would like to use this in a project. We can discuss the details.