Directory structure

Assets/
    3rdparty/  # downloadable content, shouldn't be part of repository
        SampleScenes/
        Standard Assets/
    Scripts/  # scripts
    StaticAssets/
        Models/
        Prefabs/
        Scenes/
        Textures/

Setting up development environment

• VS code link
• Unity debugger link

VS doesn’t have autocomplete functionality for Unity from the beginning. In order to adjust it do following steps:

• Install latest version of .NET framework (link)
• Install MONO (link)
• Install C# extension for VS code (link)
• Open Extension Setting for installed extension in previous step
• Set Omnisharp: Use Global Mono to always value (In case there is button with selecting path, add there path to the settings.json in project)

3rd party dependencies

• import https://assetstore.unity.com/packages/essentials/asset-packs/standard-assets-for-unity-2017-3-32351 to the project. and place it to Assets/3rdparty. So in the end you should have following structure:

Assets/
    3rdparty/
        SampleScenes/  # imported
        Standard Assets/  # imported