The latest release finally brings modding functionality to MiniCards, as promised. You can now create your own card games in MiniCards. Modding exposes (nearly) the full game-creating functionality (there are possibly still a few parts that are not exposed in the API yet – team piles for partnership games is one of them – if there is anything missing that you would like to see please let me know.)
In order to start playing with Game Mods, you will need to have the Premium version. Once unlocked it will install the sample mod (actually a copy of the built-in Briscola game) into the Documents/ folder on your phone – you can then edit this and mess around with it to your heart’s content.