Play as Emi without her cap. Hold the left arrow/button at the main menu. Then choose Solo Mode and style (Single, Versus, or Double). When the character select screen appears, you will be able to ...

This does not work on Tutorial, Nonstop or Challenge modes, or on Battle mode. In the Extra stage, you must play on expert difficulty with these options: 1.5x, Reverse, Rainbow, and Pressure Gauge ...