This is not an issue but instead I am curious about where you are taking this project. Some friends and I had an idea about an app that could be just a deck of cards, nothing specific to any particular game, just cards. However it would allow you to play any game you want. When I found this I was super happy this was almost exactly like what were looking to make, it even solved some of the issues I was trying to think about in how it manages multi-player by pulling the cards behind the players line.
Anyways, I am curious about where you plan to take this if anywhere at all. It's missing several key things that would make it useful for a true deck-of-cards to play complete games with. For instance, I want to re-shuffle the deck but keep certain cards out, like cards in the players hands or potentially even cards on the board, so need a way to sort of lock them in play. I have more ideas and requests for this as well but will leave it at that for now.
Great job on this BTW!