 Instead, the team adopted a quantization mechanic for the gameplay that allowed even players without natural rhythm to interact musically with the game through a process of "locking on" to enemies.This mechanic formed a core theme along which the gameplay developed.The vibration feedback made use of the Dreamcast vibration pack, the DualShock 2 controller for PS2, and a custom controller created by Mizuguchi's team for the game dubbed the Trance Vibrator.