Indie 2D pixel-art metroidvania game developed with Godot Mono v3.4.2
Get .NET Core 3.1 here Get Godot Mono v3.4.2 here
Import the project in Godot Editor and simply click run, it should take some moment for the first build since Godot will download necessary SDKs.
For C# scripts you can use an external editor. If you are, then follow here to configure the debugger.