Congratulations to your first Phaser game! This is a very nice start and I really liked the idea of combining poker with kingdom building. Of course there are still a lot of features missing, but it provides already a glimpse in what it can be.
I think important for this card game will be that it feels good and rewarding when you play good combinations. So polishing it with tweens and animations will be very important. I think you already started that with your particle effects. I would also make sure that you have a representation of your kingdom visible on the screen. In this way players can see it grow and develop.
Keep working on the game!