This is the Unity sample project for the Unity & Smart Contracts tutorial:
https://www.youtube.com/watch?v=fSKCF_tSKQc&t=1399s
Also check the FULL Unity Web3 Programming Course here:
https://www.youtube.com/watch?v=rZSPIyB-0R4&list=PLFPZ8ai7J-iQcI05EXqRUPK2VXDQaAPIr
Enjoy!