Originally during the preparation phase you should use special card to allow to keep some tile on the board and also have more extra work to prepare for the game, but due to the time I couldn't make it in time :( Same for the description of the card, I wanted to add special effect for cards (like theme) but I didn't had time to set it so I kept with the random text I have writing when rushed the creation of the cards :D
Overall thanks for your feedback, I will take them into account if I continue to work on it.