I already told you the password

You are free to leave. Just open the combination lock. 

I already told you the password on the sign beside the lock.

If you don't understand the sign, that's your problem; it's really none of my business.

Just kidding, if you get stuck, click the below text to have hints:

Area 1

• Reverse Sentence Door

  • Reverse the password.
• Small Door

  • Count the number of "/".
• Numbers Door

  • Count the number of each number and match them to the sentence "I already told you the password".
• Code Door

  • Transposition cipher.
• Code Door Advanced

  • Transposition cipher + follow the order of the sentence (clockwise from right bottom)

Area 2

• Circle Door

  • π.
• + Door

  • Do the math.
• Two doors Door

  • The sum of the previous 2 passwords.

Area 3

• Whiplash Door

  • Search the release date of "Whiplash".
• YouTube Door

  • Search the date of "Joined" of my channel.
• Date Door

  • month/day/year

Lobby

• Broken Door

  • Match the color of the buttons and color of the words.
• Big Door

  • Each area has a big button hidden.
• Walk Door

  • Imagine the top-down view of each area.

Music by Mus Endeavour