Play-a-Train

2D ground texture assets By Chromisu https://assetstore.unity.com/packages/2d/textures-materials/nature/handpainted-grass-ground-textures-187634 

Low poly asset pack by Palmov Island https://assetstore.unity.com/packages/3d/environments/landscapes/low-poly-atmospheric-locations-pack-278928 

Metal Ping.aif by timgormly -- https://freesound.org/s/170957/ -- License: Attribution 4.0 

MiniBokeh by Keijiro https://github.com/keijiro/MiniBokeh 

"Ethereal Relaxation" Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/