Gameplay
Core gameplay remained the same on Happy Sky. Songs are now ranked on a 12-point rating scale, with the difficulties being renamed in the process as well. "LIGHT7/14" is now Normal and "7/14KEYS" is now Hyper. All songs have been readjusted to fit the new ranking scales. A new folder called "HARD CLEAR" has also been added to the song selection screen for songs cleared using the Hard mode modifier, it is considered to be of higher value than a Full Combo.
Two new modifiers have been added, Hidden+ and Sudden+, which allows the user to adjust a lane cover to cover up a specific portion of the screen. This had been popularly done with towels beforehand, acknowledged by Konami in the PS2 version of Gold, which offers a picture of a towel as one of the lane cover options.
Read more about this topic: Beatmania IIDX 12: Happy Sky