A few reviewers have pointed out things I need to fix in a few of my songs. Because of this, I am going through all of my music to improve their quality to match my current skill level. I've already completed some of them.
These are completed:
http://www.newgrounds.com/audio/listen /225914 Grit's Theme
http://www.newgrounds.com/audio/listen /226339 Sensei's Theme
http://www.newgrounds.com/audio/listen /238207 Jake's Theme
http://www.newgrounds.com/audio/listen /228875 Sami's Theme
http://www.newgrounds.com/audio/listen /227842 Andy's Anthem

There're a few more I'm gonna redo.