Added visual aid to the audio-based puzzle for improved clarity and made various minor adjustments.

- Added a hint to better understand the link between the elements of a specific puzzle
- Changed the sensibility of the trigger to go upstairs
- Changed signs and text when finishing the room

Added a larger collider that makes it easier to interact with the key at the end

<Patch Note>

Set post processing as required in the room settings to avoid strange, unintended transitions between scenes

Fixed blurry textures

Changed minor details

Changed some important stuff

Fixed an important issue that would cause an animation sequenze to trigger twice if the reception bell was pressed twice, which would have the unwanted consequence that the hidden room would become unaccessible right after having become accessible[/spoler]. Also changed the way the combination of two puzzles in the lounge area (tables puzzle and piano puzzle) works, so the players now no longer can skip the tables puzzle, which before the change would have unwanted consequences.

Solved an issue with a puzzle using LUA scripting that some players have reported. The issue could occur when playing co-op or randomly as a glitch in single-player mode. The LUA script has now been replaced with a more stable solution so that this glitch will not occur anymore.