This is the Software Development Kit (SDK) for creating your own Terrarium creatures. The SDK is avaialable via NuGet at https://www.nuget.org/packages/Terrarium.Sdk/
To start using the SDK in your own creature (a Class library), run the following command in the Package Manager Console
PM> Install-Package Terrarium.Sdk
The SDK docs are up! Click here to view them now.
Terrarium is a continuation of the .NET Terrarium project on CodePlex