Bug fixes and improvements

-Spam proofed the lab doors to not crash the game if the interaction button is spam clicked

-Fixed the issue of the passcode sheets appearing in the past labs if the player already used their passcode sheet

-Made the returning to hallway button's text more understandable by setting it to "Hallway"

-Changed the music's behavior from "Pausing" to "Lowering its own volume down" when a minigame ends