This is just so awesome and made me so happy. All the songs are great, but Gentoo is my favorite, it's so funky. That syncopated part with the Left + Downs and the Right + Ups is so much fun to play.
I do feel like sometimes the vocals in the song do not match exactly with the arrows - I noticed a few times that there's some vocals in the song that don't have a corresponding arrow, and sometimes there's some arrows that don't have a corresponding vocal in the song. For the most part though, everything lines up very well, which must have taken a lot of time to map out and sync up. Good job!