PLEASE TURN YOUR VOLUME UP AND PLAY WITH HEADPHONE!! (This is in case you have trouble knowing where the sounds come from. Otherwise I can't assure you the best experience) 

• WASD or directional arrows to move
• Find the music box
  
• Use your auditory senses to guide yourself through the unknown
• Walls usually lead you to your objective

Being isolated in utter darkness for so long can't be good, can it?