The level’s reputation has spawned a small subculture:
If you're a fan of music games, rhythm games, or just looking for a new challenge, Project Arrhythmia: Nightmare City is a must-play. With its engaging gameplay and haunting soundtrack, this game is sure to keep you coming back for more.
Halfway through the song, the screen literally inverts. Black becomes white, up becomes down. The boss fires a massive wall of spikes from the top of the screen, but because of the visual inversion, your depth perception is shattered. You have to unlearn what you know about the arena for exactly 16 beats.