Source

Low Poly fire: https://assetstore.unity.com/packages/vfx/particles/fire-explosions/low-poly-fire-244190

Low Poly Island: https://assetstore.unity.com/packages/3d/environments/low-poly-tropical-island-lite-242437

Palm Tree : https://assetstore.unity.com/packages/3d/vegetation/trees/palm-tree-123890

Open Chest Sound:

https://freesound.org/people/kickhat/sounds/663168/

https://freesound.org/people/EpicSoundEffects/sounds/475880/

https://freesound.org/people/LittleRobotSoundFactory/sounds/270468/

Grass Texture: https://assetstore.unity.com/packages/2d/textures-materials/floors/hand-painted-grass-texture-78552

Water Shader: https://assetstore.unity.com/packages/2d/textures-materials/water/simple-water-shader-urp-191449

Heart/Drop/Ghost: Library Microsoft Paint 3D

Coin: Painted with Microsoft Paint 3D

Snowflake: https://www.flaticon.com/search?word=snow%20flake

Trailer: https://freesound.org/people/Fission9/sounds/504641/