We have never seen such a game (although we are poorly oriented in mobile games and in your game genre). Therefore, we can’t say anything about how interesting this is to a large audience, but at least for us, it looks unusual and cool.
This is not a feedback, just for some reason, two thoughts occurred to us. First, perhaps your game can help the player to learn a foreign language. Secondly, what happens if you play not with the other player, but with artificial intelligence?