Those steps:
Step 1: Extract both Main Game cia and Update 3.2 cia then navigate to romfs
Step 2: Apply xdelta patch Snack World 3DS - Game to archive_a.fa Main Games files.
Step 3: Apply xdelta patch Snack World 3DS - Update to archive_a.fa to the 3.2 update files.
Step 4: Repack both cia...
Only thing drive me crazy is all these new horror games nowadays is its so dark, all time. I can't even play them. I understand they trying to create spooky but be creative a little, not just darkness with pop out scare scenes.