Broken buttons, AV lag, etc
The register between the notes and the catcher was terrible, on Chaoz Airflow, it missed a little more than half of the notes that I hit (even during simple parts, don't pull skill into this because I played your beta and could do Chaoz just fine)
There was also lag between the video and the song, I don't know why, but the board would stutter in order to compensate for the music lag.