Please note which assets were self made, i.e, Music, UI, Character art etc.
Models and textures of the main environment and 'ghost/zombie thing' were imported. As well as ambient sounds and shaders.

The rest was self made

Assets:

https://assetstore.unity.com/packages/2d/textures-materials/sky/10-skyboxes-pack-day-night-32236
https://assetstore.unity.com/packages/2d/textures-materials/water/simple-water-shader-urp-191449
https://assetstore.unity.com/packages/3d/environments/flooded-grounds-48529
https://assetstore.unity.com/packages/tools/particles-effects/feel-183370
https://assetstore.unity.com/packages/tools/utilities/hot-reload-edit-code-without-compiling-254358
Sound Effect by https://pixabay.com/users/lucadialessandro-25927643/?utm_source=link-attribution&utm_medium=referral&utm_campaign=music&utm_content=230091
Sound Effect from https://pixabay.com/sound-effects/?utm_source=link-attribution&utm_medium=referral&utm_campaign=music&utm_content=28867