Added:

• Level 3 'intro' story text
• Steel Door open/close sounds
• Steam vent sound
• Acid floor bubbles audio
• 'Finger hazard' audio
• Secret stone wall sounds (lvl 3)
• Metal bar door sounds
• Raise/Lower metal stairs audio
• Metal secret wall audio
• Moving Platform sounds
• 'Jump Scare' steam sound
• Roller shutter sound
• Acid 'water' fall audio
• Big sci-fi door audio
• Big Metal cylinder door sounds
• Screen Shake trigger on platform drop
• Invisible walls at ends of big platform
• 'Fast Body' enemy to level 3
• Steam particles on steam vents (lvl 3)

Changes:

• Map 1 brighter lighting
• Map 3 redesign
• Map 3 brighter lighting
• Moving Platform slower movement
• 'Body' enemy movement speed increase (4 -> 5)
• 'Head' enemy movement speed increase (5 -> 6)
• 'Head' enemy attack speed increase (8 -> 9)
• Player footstep audio volume increased
• Moved various collectible positions