Update instructions on 12.16

Soul Street

Psychic Sleuth: Street of Falling Souls is a deductive adventure game that combines narrative and puzzle solving, with rational reasoning to obtain relevant and important information to advance the story and unravel the truth of the case, as well as the mysterious forces behind the organisation.

1. Add in-game guidance tips. 2. Add a save point in the underground scene. 3. Adjust the background music volume. 4. Fix game bugs.