More important changes and fixes:
Reworked recorder to fix bugs in it
Made loading screen unified with level loading
Removed character falling to the floor when finding the next level
Recreated the map in level 3 to make it easier to read and to make level 3 easier
Added light to checkpoint button to make it easier to see
Fixed visual bug with clients and rising lava at the end of level 7
Fixed a bug in level 3 where you clip through the elevator floor after it comes back up
Changed notes so that multiple players can view them at the same time
Added indicating "battery" to level 2 timerbutton

Other less important:
Changed level 4 atmosphere
Optimized some entity memory usage
Optimized player character memory usage
Lowered alarm volume
Fixed some bug with the pipe puzzle on level 6
Changed appearance of options and controls because of data loss
Changed appearance of spectator screen
Made first level change more reliable

Made loading screen appear for all on level change and reset
Made Join/Left text appear for all
Fixed crosshair not appearing when looking at cubes
Modified crosshair behavior
Fixed some bugs with inventory items on level change
Reworked/fixed level transfer (to be more reliable)
Modified level exit behavior
Small refinements to inventory and pause menu UI
Increased interaction distance with notes

Added ping to playerlist
Added camera shake when really thirsty
Added camera shake when consuming pills or mushrooms
Added camera shake when taking damage from some of the entities
Added jump scare effects for each entity that hunts players
Added sanity gaining effect for mushrooms
Added sound for eating mushrooms
Added sound for levers
Added sound for electricboxes on level 5
Added correct sound for indicator lights
Added peepholes for level 5 "toilets"