If your intent is to "make" (create) a mod or paper-based layout for the game, the developers provide official Software Development Kits (SDKs) on the Mana Games Modding Forum:
: As of late 2023, you can often download mods directly within the game using the Mod Management tool (mod.io) found in the main menu. Manual Method (ZIP Files) : File: Tennis.Elbow.4.zip ...
Restart the game and ensure the mod is enabled in the settings or mod manager. If your intent is to "make" (create) a