Game mechanics

This is the in-game mechanics of SEVEN's CODE.

Basics
There haves 2 modes in this game: Simple and Chaos.

And also, there haves 4 main notes in each mode:
 * REFLECTION: Tap when it conscends to the judgement line (Simple) / its approaching line conscends to this note.
 * CHARGE: Tap and hold when it conscends to the judgement line (Simple) / its approaching line conscends to this note, and hold till its end. This will refill the player's skill gauge.
 * CHAIN: Tap, then follow the lane and slide through.
 * SLASH: Slide in direction.
 * Notice that if there appears with multi notes, it will marked by a outer circle.

Scoring
Performance The max score is 100.00%. the score is calculated by following formula:
 * FABULOUS: Hit the note in time.
 * CRITICAL: Hit the note but with small deviation.
 * BURST: Hit the note but with middle deviation.
 * HIT: Hit the note but with high deviation.
 * MISS: Don't hit the note.
 * 理論値: Clear with only FABULOUS.
 * PERFECT FULL COMBO: Clear with only FABULOUS and CRITICAL.
 * FULL COMBO: Clear without MISS.
 * CLEAR: Clear the song, no matter any situation.

$$\text{Score} = \frac {(F+C)+B \frac{2}{3}}{Notes}\times 100.00%$$

(F=FABULOUS count, C=Critical count, B=Burst count)