I enjoyed this game, & with a few changes, it would be a better game.
firstly-
Luck is imbalanced, not that it makes it unfair for one player, but I too often get 20 4s filling up half the cards that I get. Try adding a max limit of each kind that can only be broken by all prior maxes being filled.
Secondly-
An undo button needs to be added, that can be activated whenever you have not picked up another card. It can make a big difference if you play a card, & realize too late your mistake, or even accidentally misplaced a card. A mistake that will never happen with a real deck.
Thirdly-
At the start of each new game, the banner signifying who starts & why should be an option that can be disabled.
Fourthly-
The A.I. Gives you what you need to win by placing down the card just prior to what you need. Have it analyze your deck.
Lastly-
The king should go last, as it gives the first player an immediate advantage.
It is a good game, I just simply played it too much to find it an easy game to be enjoyed anymore.