Art by Folkou
- The exact unlock conditions are still unknown, but it is possible to unlock the normal difficulty (and perhaps the hard) by playing Spin-Angular-Momentum!!! (Solarsphere) and meeting unknown conditions. (This is not a sphere level unlock.)
- As of version 1.0.8e, Flugel has the highest rated Normal and Hard chart.
- Flugel is German for "wing."
- Flugel's normal chart is the only normal chart that is not playable in Press/Start. It is only playable in Solarsphere.
- Flugel's hard chart is the first chart in Tone Sphere to pass the 2000 combo mark.
- This song appears as the 14th track of Cranky's album "Concerto". More info can be found here.
- This song was also used as Angel's boss theme in the game "eXceed 2 -Vampire REX-". The game can be purchased here.