I made a 3D Hovercraft Shooter game with Unity last Tuesday and I pushed it to my github. The entire source code is available here. If you prefer to copy the link, it’s here: https://github.com/joaokucera/unity-hovercraft.
There is also a webgl demo here.
There is no license, no condition, download and use it as you wish. I hope this helps you to study #unity3d and if this help you then give me a github’s star.